put something on facebook. diana is one of my oldest friends. >> i couldn't believe it. it still does not seem real. >> the wedding was in the woods. >> a nice outdoor forest wedding. >> a few years later, the marriage was in shambles. >> she wanted a clean divorce. >> a call out of the blue. >> they were going to meet? >> yes. >> did they find the shooter? >> vanished. >> who was this mystery man on a midnight mission? >> a but everything you would need to murder someone. >> it was a gunman police and maybe even you already know. >> i had seen dateline previously. >> someone was hiding a secret. >> where there's smoke there's fire. >> she started crying and said it's all true. >> a conspiracy to kill his caught on camera. >> when we open that email and saw that video, we were like, oh, my gosh. >> a shot in the dark and stunner in court. >> every once in a while we get a doozy and this was one of them . hello and welcome to dateline. diana and her husband were living the california dream. both were smart, outdoorsy types and the couple had welcomed a beautiful baby boy. then, it took a turn. not toward happily ever after but somewhere much darker. a call from a stranger would send one of them down an isolator road to retrieve a mysterious package. what was behind the secret admission and who would set it off? here is andrea canning with the night to the new moon. >> it was dark when it happen. so dark, strontium or's have a name for it. the night of the new moon. when the moon, the sun and the earth are in alignment and the lunar cycle begins anew. some look at a new moon is a time of rebirth, a fresh start. if only the people we trust on earth were as dependable as the night sky. >> there's a guy lying down like a sniper. he shot at us six or seven times. >> carlsbad, affluent seaside community in northern san diego county. a tourist haven known for beaches, surfing, and breathtaking views. this paradise became home to a woman named diana lovejoy. >> she's funny and silly and smart. really easy to talk to. >> sarah became fast friends with diana when they met in the six grade. >> through high school we would write to larry's notes to each other. still paid attention in class. >> of course. >> of course. we would challenge each other, the first sentence of a romance novel. >> she said diana had a gift for creative writing as well as music. something sarah, a professional bassoonist, know something about. >> she was a fantastic piano player. >> you shared a love of music. >> yeah, we did. we were in marching band together. it was fun. >> she had a schedule. she would wake up. >> jennifer was her college roommate. >> she was extremely discipline. >> diana was passionate about staying fit. >> going for a walk. taking a hike, going for a swim. >> her healthy lifestyle and good looks were hard to miss. >> is seemed guys always really liked her. she was not trying to attacked -- a track attention but she was someone people noticed her. >> she was very pretty. >> super pretty and she has those long legs. >> it was a complete package about diana. so smart, gorgeous. sweet, caring. >> diana went to work in the tech industry and ramped up her fitness routine. >> she competed in several triathlons and was a personal fitness coach. >> eventually, single and focus, she met someone who also loved bike riding and soaking up the outdoors. a software engineer named greg. >> he was gracious and very sweet. very much like her. >> after two years of dating, diana and greg tied the knot in august 2007. >> they seemed like the right fit and she seemed happy. >> they were eager to start a family. but that didn't come easy for her? diana suffered multiple miscarriages and then had a difficult high risk pregnancy which made september 2012 all the more special when she gave birth to a healthy baby boy. that must've been an incredible day for her to know the baby was born. at last, diana had a happy family. that would not last long. by the time the sun turned two, the marriage was falling apart. diana kicked greg out of the house and got a restraining order against him. in court documents, diana alleged that greg said he wished her dead. that he sexually molested her in her sleep, and she suspected he also molested their son. greg denied all of the allegations and fired back said diana had verbally and physically berated, attacked, and belittled him over the last several years. things were getting ugly. >> things were getting ugly. >> greg filed for divorce and the couple thought bitterly over custody of their son. at first, greg was only allowed supervised visits. after numerous evaluations by therapists and law enforcement, courts found no evidence of abuse and ultimately awarded greg 50/50 custody with diana. diana was scared for herself and her son. a fear that ultimately led her here, shooting range. >> i was surprised when she was taking lessons, this is more serious than i thought. she is concerned about her safety in a really, really real way. >> at the range it seemed diana met the man she was looking for. a former marine skilled in self- defense. someone you might know too from dateline. >> coming up. >> i've always been very protective person. >> we first met him when he helped rescue a woman from danger. >> he sounds like he was looking up for you a little bit. >> he helped me so much. >> when he met diana, something changed. >> she would text him at all different times. i did not like that. that. say hello to your fairy godmother alice, and long-lasting gain scent beads. part of the irresistible scent collection from gain. 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( announcer) you can quit. for free help, call 1-800-quit-now you are bountiful. your skeleton can support two times your weight. it's in your nature to stand strong. supplement your bones with high-absorption magnesium. nature's bounty. it's in your nature. dave's company just scored the comcast business 5-year price lock guarantee. high five! high five... -i'm on a call. it's 5 years of reliable, gig speed internet... five years of advanced security... five years of a great rate that won't change. yep, dave's feeling it. yes. but it's only for a limited time. five years? -five years. introducing the comcast business 5-year price lock guarantee. powering 5 years of savings. powering possibilities. - [narrator] life with ear ringing sounded like a constant train whistle i couldn't escape. then i started taking lipo flavonoid. with 60 years of clinical experience, it's the number one doctor recommended brand for ear ringing. and now i'm finally free. take back control with lipo flavonoid. one diana lovejoy decided to take shooting lessons for self-defense, she went to a range called iron sites and that's where she met a man with the expertise and attitude she needed. >> i hate bullies. >> weldon mcdavid was passionate about protecting other people. >> i used to protect my friends on the way home from school. we had a bully who tried and tried to start fights with us. i found out that nicely applied arm lock would get the bully to kiss the street and we didn't have to run from him anymore. >> he enlisted in the marine corps after leaving the service, he worked as a firearms instructor. we met him in 2013 when we covered the story of another woman he met at the shooting range. >> the customer walked in and i could tell something was wrong with her. i couldn't tell what, but i could read she was under stress. >> her name was crystal harris. >> he was like can i help you? i said i need to buy a gun. it's not just for putting it away. my life is in danger. it's from my husband. he was like, whoa. >> crystal a mother two sons said her husband was violent and abusive. she said she wanted to buy a gun for protection. >> at that point, i asked are you prepared to kill him? because that's a very real possibility. his life, your son's life, or your life, you have to make that decision. after a few moments she said, yes, if i have to. >> weldon to crystal under his wing and taught her to defend herself even in stressful situations. sounds like he was looking out for you a little bit? >> yeah, somebody in the business of saving lives. you know, a warrior and hero and that mentality, yeah, he wanted to help me. >> at home crystal helped herself. used a mini cassette recorder to gather evidence against her husband. >> oh, god. stop. please, please stop. >> when i christer captured something horrible and said it was audio of her husband. >> you're choking me. >> she walked in and was visibly shaken. i knew something had happened. >> crystal played a bit of the tape for weldon. >> i've always been a protective person. if you are friend or family, i will do anything for you. i really wanted to go and kill him. >> crystal later called police and had her husband arrested. when he made bail, she called weldon who came to her house to find the safest place to hide. >> checked out the house top to bottom. told her defensible spaces. >> crystal never needed to use her gun. her husband was convicted of a forcible sex crime and found -- spent five years behind bars but she was grateful for the sense of empowerment and protection that weldon mcdavid gave her. >> he helped me so much. >> it's an unlikely friendship. >> if i was worried about something or needed him, could call him. >> crystal embarked on a new life without her husband and weldon moved in too. a few years after befriending crystal, weldon found romance when he meant a woman called leah. >> i had decided to learn how to shoot and buy a firearm and learn how to use it. i was tired of feeling vulnerable as a woman. scared of noises at night. >> she said weldon didn't make a huge impression when he rang up her purchases but soon she realized. >> he was interested and i was not, at first. he won me over. >> how did he do that? >> he is witty and has good intelligence and humor. really engaging personality. >> weldon told her about his work with crystal harris. >> it was consistent that he had helped people feel confident and safe. >> just like crystal, leah felt empowered around weldon. >> he is strong and i enjoyed his strength and i felt safe around him. >> leah became missis mcdavid. listened two years later, she gave birth to their son. somewhere in there weldon told her about another woman he was helping at the range. a woman named diana lovejoy. >> he told me about her husband and she was afraid of him and they were going through a divorce. >> it seemed weldon had assumed the role of protector. this time in diana's life but leah but something didn't seem quite right. >> she would text him at different times about things. i did not like that. i didn't think it was professional. we disagreed about him communicating with her, and i think he saw the need of somebody both herself and more so her child who could not protect himself, and felt like he needed to help. >> something weldon had done all his life. leah could understand that . what she could not understand was what came next. >> this is 911. >> friend has just been shot. >> with got the paramedics. were getting the paramedics on route. >> a sniper waiting in the dark, but who was the target? 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[ speaking minionese ] [ laughter ] good luck with that. hello, this is 911. >> on a moonless night, september 1, 2016. >> my friend has just been shot. >> the man on the line describes a scene that doesn't happen in this affluent community. multiple gunshots fired. appearance sniper on the loose. >> he was lying down like in a sniper position. >> i'm at home and sleeping. >> carlsbad detective sergeant darby is on call that night. >> we are calling every detective that's available to come in. >> she learned the 911 caller was a man named jason and he was calling about his coworker. diana lovejoy's husband, greg mulvihill. >> he said his friend greg mulvihill had been shot and they needed assistance immediately. >> ernst learn when the first officer got to the syncope found greg and his car, bleeding from a gunshot wound. >> he was shot in the left side of his chest and the bullet went essentially in through the front and out the back. >> while greg was rushed to the hospital, a s.w.a.t. team come the hillside where he had been shot. did they find the shooter? >> no. vanished. >> sergeant ernst heard a detail that was curious. when the 911 call about the shooting came in, the situation immediately ring a bell with the dispatchers. >> greg mulvihill called the dispatchers earlier in the evening to ask advice. he received a phone call from an when a person stating that person was a private investigator and had some information. >> greg said the mysterious caller was a man with a deep voice who claimed to have documents that greg would want to see. he got the impression it was evidence that could be used against him in his custody battle against diana. the man said he would leave a package for greg to pick up. greg asked the dispatcher whether he should go. what was the response? >> probably not a good idea but it was up to him. >> and he went. this was the meeting spot. isolated dirt road near a power pole. greg asked his boss and neighbor jason to join him on this bizarre mission. jason told police around 11:00 p.m., they pulled up to the intersection of the dirt road. the sergeant and the detective took us there. >> the package was supposed to be taped along the power pole. >> greg carried a bicycle light and gave his friend a child's baseball bat, just in case. they walked along the path and looked for the package but could not find it. greg scanned the area with a slight but then noticed in the brush. >> he sees it's a person laying on the ground holding a rifle. >> that's terrifying. the man appeared to be wearing camouflage. greg or jason yelled gun or maybe run. >> they turned into back towards the car. that is when mulvihill was shot. as they are running back, they are hearing multiple rounds whizzing past their head. >> they got in the car and took up but then greg realized how badly he was injured. he pulled over and jason called 911. greg mulvihill was being hunted but he did not know the trap he was walking into. >> correct. nor who was sending him. >> greg survived his injuries. >> he was in the dark and didn't have any idea who would do this for anybody he could think of that would do this. >> greg did say he was nearing the end of it custody dispute with his wife but quickly dismissed the idea that she could've played any role in what happened. >> she's not the type of person. she couldn't be involved in any way. >> police paid a visit to diana, and she had no idea who shot greg. >> there's nothing in his history that would've led us to believe he was involved in criminal activity or any of his acquaintances would've done him harm based on activities he was involved in. >> didn't have secrets from his job? high-level job with computers? >> he brought his bus with him to the crime. >> the sergeant had one lead to follow. >> we need to get to the phone number that was used to call him to lure him to this area. >> when the number was traced. >> it was a burner phone. there won't be subscriber information. >> they were able to track the purchase of the phone to this best buy about four miles from the crime scene. >> they had the video surveillance of the purchase. >> best buy email the sergeant still photos from the surveillance camera. >> i called in scott and other detectives to be ready for who this mystery person was going to be buying this tracfone. >> who was it? >> coming up. a would-be killer caught on camera. >> is this a smoking gun? king this is a hot flash. but this is a not flash. for moderate to severe vasomotor symptoms due to menopause... ...veozah is the first and only prescription treatment that directly blocks a source of hot flashes and night sweats. with 100% hormone-free veozah... ...you can have fewer hot flashes... ...and more not flashes. veozah reduces the number and severity of hot flashes day and night. don't use veozah if you have cirrhosis, severe kidney problems, kidney failure, or take cyp1a2 inhibitors. increased liver blood test values may occur. your doctor will check them before and during treatment. most common side effects include stomach pain, diarrhea, difficulty sleeping, and back pain. ask your doctor about hormone-free veozah... ...and enjoy more not flashes. you could save on veozah. visit saveonveozah.com to learn more. (michael) copd is harder on the folks around you, i think. my wife smoked, and she quit. because she needs to be here for to take care of me. (announcer) the people you love are worth quitting for. you can quit. for free help, call 1-800-quit-now. [sneezes] can a can of lysol take care of my snotty sofa? can-do mildewy tiles? can-do - these? - yup, it's the can-do can. nothing kills more germs on more surfaces than lysol disinfectant spray. - [narrator] life with ear ringing sounded like a constant train whistle i couldn't escape. then i started taking lipo flavonoid. with 60 years of clinical experience, it's the number one doctor recommended brand for ear ringing. and now i'm finally free. take back control with lipo flavonoid. - [narrator] life with ear ringing sounded like a constant train whistle i couldn't escape. then i started taking lipo flavonoid. with 60 years of clinical experience, it's the number one doctor recommended brand for ear ringing. and now i'm finally free. take back control with lipo flavonoid. i'm richard lui and these are the news headlines. much of the country expected to start baking under the heat wave that began last week. record temperatures possible in states with dangerous heat. police in ohio seeking a suspect after a mass shooting in columbus early sunday. it left 10 injured. victims range from 16 to 27 and nine are listed as stable while one is critically wounded. welcome back to dateline. i'm craig melvin. investigators believed greg mulvihill was being hunted. he received a phone call from a stranger who offered to turn over potentially damaging information, but instead led greg into an ambush. scouring the scene, police enough in the gun man but they did track down a promising clue . one that was about to leave detectives to a startling to discovery. my friend has been shot. >> greg mulvihill had been shot and barely survived. someone had lured him to the scene of the crime of the call from a burner phone. now, police gathered around a computer screen to see security camera images of the person who bought the burner. who was it? >> it was diana lovejoy. >> diana lovejoy, greg mulvihill's soon-to-be ex-wife. is this a smoking gun getting this photo? of diana lovejoy? >> it points us in a direction but there's more to be done. >> the team searched for more evidence and diana's home. >> we located the clothing she was wearing when she purchased the phone. >> they had enough to arrest diana and bring her in for questioning. at first she denied involvement in the shooting. what's her alibi? >> she was at home and never went out. >> police realize you might be telling the truth just because she bought the tracfone doesn't mean she was at the crime scene. diana was most likely not the person lying in the grass in camouflage with a rifle. >> fair to say. >> did you ask if she hired someone? >> yes. no, did not. >> detectives pressed her and diana told them something they did not expect. >> she started to describe her relationship with her shooting instructor. >> diana told police her instructor's name, weldon mcdavid. >> he had volunteered to help her protect herself from her ex- husband. >> weldon mcdavid was the knight in shining armor to another woman in this area. >> yes. >> that woman was crystal harris. police knew about her situation but diana's story was different. and, it seemed to change as they questioned her. diana told police that weldon agreed to help her when custody of her son by intimidating greg. >> weldon was to scare her ex- husband and give her a brooding person over him to tell him he needed to drop his custody and disappear. >> diana said she paid weldon for his services. >> she gave 1000 up front and to 1000 after was supposed to be paid. >> for scaring him. >> yes. >> diana said she bilked up weldon at this park and ride. >> he gets in her car carrying a soft rifle case and dressed in camouflage. she asked what was in the case and he said not to worry about it. >> she said she gave him the burner phone dropped him off then waited for his call. when she went back to pick him up? >> he gets in the car and states things went wrong, and i had to shoot. >> did she say her reaction? >> she didn't know what happened and she did not ask anything else. >> that was diana's story. she hired her shooting instructor to intimidate greg, but that was it. now, police had another suspect. weldon mcdavid. his wife leo was home with her newborn baby when the phone rang. >> i answered the phone and it was wet and they told me to come out of the house with the baby. >> did you have any clue why they were there? >> no. >> they were there to look for evidence that weldon shot greg mulvihill. >> the most striking thing is he had guns everywhere. >> san diego county deputy attorney said they found a number of guns in the house but none was connected to the crime. then, hidden in the garage. >> they found the upper portion of an ar 15. >> noticed there was a suppressor or silencer attached to the weapon and a bag that catches shell casing so they don't fall to the gown -- ground. >> it had spent shell casings and that. the same number of shots of fire that night in carlsbad. >> you think you found the weapon. >> without a doubt. >> but lea had plenty of doubts. >> he has the skills to do that but he does not have the personality are hard to do that. >> police arrested weldon and at the station he initially denied everything. >> a gentleman was shot. i asked for your were? >> what location? >> rancho -- >> i don't know that location. >> when police told them they had potential dna evidence that would place him at the scene, his story suddenly changed. >> i have a feeling i'm being set up. >> by who? >> i know one being set up. >> who setting you up? >> the prosecutor did not believe weldon had been framed exactly, but set up? in a way, yes. remember the horrible allegations of abuse that diana made against greg that he molested her and their son? they believe she fabricated them. >> all the therapists, physicians, everyone involved made the determination there was no truth to it. when the court system did not believe her, she decided to come up with a way to have him killed. >> the prosecutor said that's where weldon came in. the self-styled protector, a man primed to react to the exact type of allegations diana was making. >>, got. step. >> remember what weldon said when he heard crystal's recording of her husband's abuse? >> i really wanted to kill him. >> the prosecutor believed diana believed he could get rid of greg. >> i think she saw in weldon the exact kind of person she would need to carry this out. it is somebody who has a hero complex and she needed somebody she could manipulate. >> the prosecutor learned something is. diana admitted she has slept with weldon. >> i think she used her sexuality to get him to do what she wanted him to do. >> september 12, 2016, weldon mcdavid and diana lovejoy were both arraigned on charges of attempted murder and conspiracy to commit murder. was diana a criminal mastermind who manipulated weldon? sent him on a mission to kill? was weldon a would be warrior prior to intimidate greg but decided to murder him instead? the two would face trial together in their defense? you will just have to hear it for yourself. coming up. the victim. >> i realized i was looking at a barrel and scope of a gun. >> the shooter. 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[ laughter ] i'm coming for my revenge gru. who's the loser now? loser loser. -loser, loser. late october, 2017, weldon mcdavid and diana lovejoy one time gun instructor and student, one-time lovers, now on trial together. facing charges they conspired in the attempted murder of diana's husband, greg mulvihill. >> i ask you find both defendants guilty. >> the prosecutor knew she had a strong case. >> i was on a dirt road. >> weldon mcdavid placed himself at the scene of the shooting and diana admitted paying him to scare her husband. they worried the defense would try to use diana's unsubstantiated allegations of sexual assault against greg to try to sway the jury. >> they might see this as she had a right to do that if her husband was doing something to the child. >> i had to walk a balance of deciding whether or not i would like in ski the allegations that she had made or tried to ignore them and ultimately, i decided to take it square on. >> it was one of the first thing she asked greg about. >> did you sexually assault your wife? >> no. >> did you molester boy? >> no. >> he said he fought hard for custody of his child and did not want to risk losing this way felt compelled to see whatever information the mysterious caller had for him. greg demonstrated how he was holding the parade bicycle light when he noticed what he thought was a pile of clothes in the brush. >> for a second, i realized i was looking at a barrel and scope of a gun. >> and then a gun shop. >> it felt like i had been hit in the back which was confusing to me because i knew i was looking at a gun, but it felt i was hit in the back. >> in the confusion, greg said he or jason yelled run or possibly gun. >> while we were running i heard six more rapid gunshots. >> the prosecution argued diana paid weldon mcdavid to kill greg that night, and it seemed weldon may not have been the only one diana approached with this goal in mind. there was an unlikely witness against diana, a woman who reluctantly shared her story with prosecutors. her own aunt diana clark. >> diana said they made a promise not to tell my mom or sister. can you promise me that? i said yes. >> aunt diana testified that on christmas day 2015 her niece asked her this. >> she said, can you help me find someone to kill greg? >> she did not help her niece find a hitman. instead, the state argued, diana lovejoy found weldon mcdavid. when it came time for the defense to make its case, he was the star witness. >> you talked about -- >> according to weldon, the only plan was to gather information for diana. >> how much was she going to pay you together information? >> $2000. >> weldon city called greg from the burner phone claiming he had evidence he had abused his child. the idea that if greg actually showed up at the location, that proved his guilt. weldon plan to record greg so diana could take that information to court. >> anybody who's not guilty of child abuse, in my mind, would not come out to meet someone to pick up any evidence that they didn't know where it came from. >> he said he was planning to fire any shots until he claimed he heard one of the men say, i've got a gun. >> as soon as he said those words, i decided i had to do something. >> weldon city aimed his ar 15 at the flashlight and fire. he said he hit greg by accident. >> the shot i missed was the flashlight. >> weldon's proof it was not intentional? he said he was such a good shot that if he had been shooting to kill, he would have. >> i didn't miss a man sized target. it would not happen. >> in a well-meaning way, he came up with a stupid plan and brought a gun. >> he is the former attorney of weldon and didn't represent him at the trial. he believed weldon acted out of a misguided hero complex but never plan to kill or even hurt greg mulvihill. he said he thinks weldon's experience with crystal harris had a profound impact on him. >> that was the first case worry he said no one was listening to the woman and the woman was born to be correct. now, he has a second woman saying nobody is listening to me. what do you do when nobody else wants to help? you help. >> did you yourself have conversations about a plan to kill greg mulvihill? >> no. >> the big question on cross- examination, why show up in camouflage with an ar 15 was just to record greg picking up the package? >> could you not have accomplished the same goal by sitting in your car and watch him walk down? >> that would put me in the open and make me a potential target. >> you felt it was safer for everyone concerned for you to be dressed in camo with an ar- 15 under the bushes. that was safer? >> based on my training and my experience, yes, i thought that was the safest for everyone involved. >> remember how dark it was the night of the shooting? the night of the new moon? the prosecutor said that was no coincidence. diana purposely chosen night when weldon could hide unseen. >> they were google searches she had made regarding the new moon and when the peak pack but of darkness would be which happen to be at the same time they lured him out there. >> and, the prosecution had one more piece of evidence for the jury. a potential financial motive for murder. as part of the divorce settlement, diana owed greg $120,000. the money was due three weeks after the day of the shooting. >> it would go to his estate which would come back to diana lovejoy. >> in closing arguments, the prosecutor said there was no doubt that diana lovejoy and weldon mcdavid conspired to kill greg mulvihill. >> they didn't plan for jason work plan for a bright bike light to light top weldon mcdavid laying on his belly and they did not plan to get caught. no reason to kill. they had 120,000 reasons to kill. >> what but the jury think? first, let's see what you think. hear what diana lovejoy and weldon had to say. >> a defendant's biggest regret. not what you might thing. >> if i could take back one thing, i would take that. >> drama in court. and it was the worst day. mom was crying. i was sad. colton: i was diagnosed with rhabdomyosarcoma. brett: once we got the first initial hit, it was just straight tears, sickness in your stomach, just don't want to get up out of bed. joe: there's always that saying, well, you've got to look on the bright side of things. tell me what the bright side of childhood cancer is. lakesha: it's a long road. it's hard. but saint jude has gotten us through it. narrator: saint jude children's research hospital works day after day to find cures and save the lives of children with cancer and other life-threatening diseases. thanks to generous donors like you, families never receive a bill from saint jude for treatment, travel, housing, or food, so they can focus on helping their child live. ashley: without all of those donations, saint jude would not be able to do all of the exceptional work that they do. narrator: for just $19 a month, you'll help us continue the life-saving research and treatment these kids need. tiffany: no matter if it's a big business or just the grandmother that donates once a month, they are changing people's lives. and that's a big deal. narrator: join with your debit or credit card right now, and we'll send you this saint jude t-shirt that you can proudly wear to show your support. nicole: our family is forever grateful for donations big and small because it's completely changed our lives and it's given us a second chance. elizabeth stewart: saint jude's not going to stop until every single kid gets that chance to walk out of the doors of this hospital cancer-free. narrator: please, don't wait. call, go online, or scan the qr code below right now. [music playing] - [narrator] life with ear ringing sounded like a constant train whistle i couldn't escape. then i started taking lipo flavonoid. with 60 years of clinical experience, it's the number one doctor recommended brand for ear ringing. and now i'm finally free. take back control with lipo flavonoid. was greg mulvihill's shooting an accident or cold- blooded murder attempt? prosecutors believed his ex-wife diana lovejoy wanted him dead and convinced her lover weldon to do her evil bidding. the defense countered that the marksman missed his target and the whole thing was a terrible mistake. the jury was about to deliver its verdict. first, weldon and diana shared what they say happened with us. here is andrea canning with the conclusion of the night of the new moon. >> i want people to know i did not attempt to murder anyone. >> we met with weldon mcdavid at the detention facility where he had been since his arrest and charges a he and diana lovejoy conspired to murder her husband. you had an ar-15 and lying on your belly in camouflage. you have a gun suppressor and a bag to catch shell casings. this sounds like a plan to kill someone. >> if i was going to kill him, could've hit him at any point in that walk. it would've been easy. >> why did you keep firing? six times. >> i fired over their head so they would run. if i wanted to kill them, i had ample opportunity. >> he told us it was ridiculous he would kill someone for $2000 and called having sex with diana his biggest regret. >> it was unsatisfying. if i could t back one thing, i would take that out of the equation. >> begin with diana? you wouldn't take back shooting greg. >> if there was one thing i could take away, would take that away. i hurt my wife and that means more to me than anything. >> weldon insisted the only thing that brought him to the dirt road the night of the shooting was a desire to help diana and her son. did diana lovejoy have a hold on you? was she manipulating you? >> no. >> it's been said you have a misguided hero complex. >> i am no one's hero. not at all. if trying to help someone is a misguided hero, then so be it. >> we went to diana's jail to speak with her as well. did you and weldon have a plan to kill greg mulvihill? >> absolutely not. >> so why lure him there. why put yourself in the position? >> he had a choice. he set up a meeting with weldon. >> we didn't have much time so we spoke again by phone. this time, i wanted to ask her about aunt diana. your aunt diana is a key witness for the prosecution. she claims you two had that conversation that you were looking for someone to kill greg. >> yes. it's not true. >> diana said she was never close with her aunt. >> i know she has -- to help greg's case because she wanted dashes >> in a letter to the court, aunt diana wrote she was always generous with her niece and supportive of her and her son. we asked diana lovejoy, did she mastermind a murder plot? >> there was no talker speaking about hurting anyone. i have a huge heart and i would never -- i'm not capable of hurting anyone. >> with the jury agreed? after half a day of deliberation, a verdict. >> we the eight jury found the defendant diana lovejoy guilty of the crime of attempted murder . >> guilty of attempted murder and conspiracy to commit murder. then, something unexpected happened. >> weldon mcdavid verdict. >> while weldon mcdavid waited to hear his fate. diana collapsed, seemingly overcome with shock. >> help her. >> court was adjourned and diana was handcuffed to a gurney, wheeled out to an ambulance and brought to a hospital where she made a full recovery. when court resumed. >> guilty of the crime of conspiracy to commit a murder. >> weldon learned he was convicted on all charges. at the sentencing hearing 2.5 months later, weldon addressed the court. >> a did not intend to shoot mulvihill. i'm sorry i shot him. it was an arrow. >> diana spoke publicly for the first time. >> it's so painful that some people in this world seem to think i would have it in me to do this. i still care about greg. i did love him. i loved him a lot. i hope that reality, the reality of what really happened. what we intended comes out. i believe it will someday. [ crying ] >> weldon was sentenced 50 years to life in prison and diana, 26 to life. did you ever think your friend diana could get wrapped up in a wild story like this? >> no. it's my worst nightmare. >> greg mulvihill has full custody of their son. >> i had a lot of hard hearts with greg mulvihill and i genuinely think he is a sweet, nice man and he did not deserve this. >> weldon's wife lea is a single parent too. >> he should not be in prison. he should be home. weldon is a beautiful person that my son should be able to have that in his life. >> weldon mcdavid, the man who said he just wanted to help. who once empowered a woman in an abusive marriage, now the fallen hero, contemplating life behind bars. perhaps he sums it up best. >> there is no winners here. no winners at all. this whole situation is a loss. that's all for this edition of dateline. i am craig melvin. thank you for watching. you for ♪♪ this sunday, presidential showdown. president biden and former president trump are set to face off in the first debate of the

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