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I dont know how anyone could ever could ever do that. They met on the job. They were an office place love story. And thats where she met her end. The blood is right by her office door. A lot of blood and a lot of trauma. A mom of two murdered at work. She wakes me up, kisses me goodbye, and thats the last i saw of her. Shed gone in extra early that morning. Just a handful of coworkers in that building. Was one of them her killer . Ive referred to this case as almost being like the game of clue. You have a very small group. We know it happens within the building. What secrets were inside that warehouse . There were pry marks on her office door. Somebody moved her body. Room to room, coworker to coworker, suspect to suspect. The perpetrator could still be there. Where was her husband . Youre a suspect and so are your friends. The detective asked me if there was any trouble in their marriage. Whodunit . Sometimes desperate people do desperate things. Im lester holt, and this is dateline. Heres josh mankiewicz. Reporter they call it the early shift for a reason. It was still an hour before dawn in this small town in Northern Kentucky, and in a few hours a local warehouse would become an anthill of activity, as the first employees of the morning arrived. But who among them could predict that before the first coffee break that day one of their coworkers would be dead . I just walked in our office, and i think somebody has killed somebody upstairs in our office. Okay. What makes you think somebody killed somebody . Shes laying there on the ground, and theres blood all over. Reporter impossible to believe in this tightknit workplace, where everyone knows everyone, but there was Michelle Mockbee, 42, wife and mother, face down in a pool of blood. The Sheriffs Department would launch an investigation. You know that your suspect is one of those people in the building . Thats right. Reporter probing for clues in the victims own private life. The detective asked me if there was any trouble in their marriage. Reporter eliminating suspect after suspect until there was one. He was never on our radar until we saw his truck leaving. Reporter if you give Michelle Mockbees siblings a chance to tell you about their sister, they cant say enough good things about her. I dont think theres enough tape to talk about michelle. She was our big sister, our role model. Michelle was just the most amazing sister that you could ever ask for, very loving, caring, giving person. She would do anything for anyone. She always had a big smile, and her laughter was contagious. Reporter michelle carried her positive spirit into the workplace. She was head of payroll at that warehouse owned by Thermo Fisher scientific, a worldwide supplier of laboratory equipment. It was also where she met her husband, dan mockbee. What was she like . What drew you to her . Michelle was funny, attractive, intelligent. Reporter ive heard you say that pictures kind of dont do her justice. No. No. No. Michelle was much more there was a vibrantness to her. I mean, she was beautiful. Reporter it was at a Thermo FisherChristmas Party back in 1999 that dan first summoned the courage to ask her out. Youd been thinking about michelle . Oh, absolutely. Id been working on her for a year, so. Reporter he asked michelle to stick with him that night. And she did. And then everything went sideways. It was the worst date in the world. Reporter what went wrong . I dont know. I was totally off my game. I couldnt speak. And i thought, oh gosh, ive done screwed this up totally. This was terrible. But then i asked her out again and she said yes and reporter well, maybe you did something right. I must have. I dont know. Or she felt sorry for me, gave me another chance. I dont know. Reporter michelles family soon met him. Next thing you know, theyre seeing each other and getting pretty serious. Reporter after she came along . Oh, my gosh, world totally changed. I mean, sun got brighter. It was just a totally different world. Reporter michelle and dan married in 2001 and continued to Work Together at Thermo Fisher. Not long after, along came two daughters. But even as busy parents, dan and michelle always planned a date night every other monday. Memorial day 2012 was no exception. How was she that night . Happy . Absolutely. Reporter normal . Uhhuh. Normal. Reporter the next morning, michelle got up to go to Thermo Fisher even earlier than usual, to wrap things up before enjoying some staycation time with the family. Dan stayed at home. Hed already started his week off. She wakes me up, kisses me goodbye, says, i love you, and went to work. Reporter and that was the last you saw of her . Thats the last i saw of her. Reporter at 5 53 a. M. , a Security Camera captured michelles car as it arrived at the parking lot. She stopped by the warehouses time clock and headed upstairs to her office. About an hour later, a supervisor named ed yuska noticed a big stain on the upstairs hallway carpet. He started looking around the area, with help from a coworker, the janitor, david dooley. Ed was out on the mezzanine just part of the ways, and i was holding the door. And there was just he said, theres a dead body laying there. Reporter what did it look like . I just saw from the knees down. I didnt see the whole thing. But honestly im glad i didnt look because id never been around anything like that. It was kind of frightening for me. Reporter someone inside Thermo Fisher had killed Michelle Mockbee. But who . And just as puzzling, why . When we come back, lockdown. The hunt for a killer begins. The perpetrator could still be there. In this giant warehouse, a giant question had someone carried out the perfect crime . Theres actually industrial strength bleach there. Rubber gloves everywhere. 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Breathe right parents help their children animals, seen those before but sometimes they do it on their own mmm foot wow food for giants oooo no wonder no one has eaten this sandwich kids discover the world with their mouths detergent is harmful if swallowed, so keep laundry pacs up and away from children brought to you by tide reporter Tuesday Morning after memorial day deputies from the boone county Sheriffs Department responded to a call of a person down at the Thermo Fisher warehouse. They rolled up to the front door and were directed upstairs. Deputy joe gregory was with them. We went over to the victim, assessed that she was dead. There was plastic wrapped around her head. There was plastic wrap around the back of her hands. Reporter the deputies did a tactical search of the area to secure it. You definitely have your guns drawn because the perpetrator could still be there. Reporter there was no sign of anyone upstairs, but the csi team that arrived soon after found hints of what had happened. A trail of blood in the hallway. A larger blood stain showing smears when lit up, as though someone had attempted a cleanup. The body itself was found in an unused mezzanine area where someone had also stashed michelles purse and a bag Holding Employee time cards. Obviously we felt like the body had been moved. Reporter putting the story together was now the job of lead investigators bruce mcvay and everett stahl. Tell me a little bit about the building where this takes place. Thermo Fisher Scientific is a company that ships medical supplies. Kind of like an amazon for medical supplies. Its a large warehouse. Reporter how large . Try the size of four football fields. Thats ulcerinducing acreage for an investigator searching for clues. But on the plus side, the warehouse was also a secure facility. Detectives say its pretty hard to get inside if youre not an employee. So you know that your suspect is one of those people in the building . Thats right. Reporter the Sheriffs Department put Thermo Fisher on lockdown. No one allowed in or out. Deputies took a head count. There were 13 workers on site. Detectives began interviewing them one by one. Im sitting actually closer than you and i are sitting to the people that im interviewing. And i can see with each person i talk to, theres no blood, theres no evidence that they have been involved in anything. Reporter if its one of these people youre interviewing, theyve disguised it well . They have. Reporter dan mockbee says back at home, he started hearing about an incident at the warehouse. They werent letting people into the building. They were turning them away. Reporter dan says he tried calling his wife and other coworkers, but no one was picking up. And thats when i started getting nervous. Reporter he drove over and was escorted inside by detective stahl. Everett stahl sat me down at a table and started to ask me a few questions. And i looked at him and i said excuse me, officer. My wife works here. I really need to know that shes all right. And thats when he told me that she was deceased. His reaction was pretty excruciating to watch. I still had to press on, and i still had to move forward with my looking at him as a possible suspect. Reporter while dan mockbee was being questioned, michelles family was starting to get word from the scene. I think i threw the phone down. And im just like no, no, this isnt happening. This isnt real. Reporter by dusk, the lockdown at the warehouse was lifted. I had each person walk through their day and it seemed like a normal day for everybody. Nobody stood out. Reporter and then, every Thermo Fisher employee was sent home. As investigators wrapped up their first major sweep of the building, they were puzzled. There was really nothing out of place in this facility. After all the searching, the offices, the warehouse, there was just nothing. Reporter it didnt help that Thermo Fishers shelves seemed perfectly stocked for a criminal. This is a company that has tyvek suits, which are what you would see in some murder investigations the detectives wearing, so they dont contaminate scenes. Theres actually industrial strength bleach there. Reporter thats stronger than any you could buy in a store. Thats right. Rubber gloves everywhere, plastic bags. I mean, if you needed to commit a murder, this place has it. Reporter the only sign of anything amiss in the entire warehouse . Michelle, as head of payroll, had a locked office, and it looked as though someone had tried to break into it. You could tell that because . There were pry marks on her office door. Reporter what was in that office that anybody would want . Thats the mystery. You know, we talked about money, but there was very little money if any at all. Reporter the following morning, Thermo Fisher employees came back on the job, shellshocked about the death of their coworker and jittery about possibly working alongside her killer. At a command Center Meeting at the sheriffs office, detectives put their Heads Together and drew up a list of potential suspects, based on the last people to see Michelle Mockbee alive, or the first to find her dead. Ed yuska, the supervisor. He was one of the two that found the body. Reporter dave dooley, the janitor. Dave dooley was with ed yuska when the body was found. Reporter doug tungate, a temp employee, and joe siegert, a warehouse worker. Doug tungate and joe siegert were the two that saw michelle when she came in. Reporter and dan mockbee. Of course, dan mockbee because hes the husband. Reporter a short list of potential suspects for prosecutor linda tally smith. Ive referred to this case as almost being like the game of clue because you have a very small group and its a matter of accounting backwards and excluding people. Reporter so thats what faced investigators. In which room . With what weapon . And finally, who . Coming up the questions begin. Where was michelles husband dan the morning of the murder . I was sleeping. What a great alibi, right . Why did you sleep on the couch and she sleep on the bed . Reporter Michelle Mockbees siblings remember her as the big sister who literally couldnt lose. She was the contest queen. She won every contest there was for like a twoyear run. Yeah. You name it. She won tvs. Flat screen tvs. Tickets to everything, gift cards, you know, everything. Super bowl parties. Lucky. She loved it. It made her so happy. And it made her even more happy to share her winnings with other people. Reporter but now it was michelles family that had lost so much. We were completely dumbfounded as to why anyone would want to hurt her. Reporter as investigators worked through their list of five initial suspects, one by one, like the prosecutors game of clue, they started at the most obvious square one, the victims husband. First couple of days police werent letting you out of their sight. No. Reporter were you worried youd be put in jail . Absolutely. You know youre as innocent as can be, but theres always a possibility of something. Reporter dan was a suspect almost from the getgo. Were you guys aware of that . I was aware of it. Because the detective that came to my house asked me if there was any trouble in their marriage. To which i replied no, not at all. I not for one Second Thought that dan would be responsible ever. And i dont think any of us did. Never. Reporter but detectives werent so sure. They peppered dan with questions. Including the big one. When police asked you where you were at the time your wife was killed i was doing what most sensible people are doing at 6 00 in the morning if they dont have to get up and go to work. I was sleeping. What a great alibi, right . Im home in bed. Its not a very good alibi, but its the only one i had. Reporter but exactly where he was sleeping that night raised a red flag for detective stahl. Dan volunteered he was downstairs on the couch. Was that a sign of trouble in the marriage . I said, well, whyd you sleep on the couch and she sleep in the bed . And he said, well, you know, typically the girls sleep with her and i get off of my shift late. By the time i get home, shes already in bed for the next day. So he had just made a habit to sleep in on the couch. It made us want to take a closer look at dan. Reporter detectives werent the only ones interested in the husband. A cadaver dog named little joe had been called in to search outside the warehouse. The dog searched two cars with no success, but then he went up to a third vehicle, a silver minivan. The dog did have some interest in the back of that vehicle. Reporter detectives knew what the dog handler didnt, that the silver minivan belonged to dan mockbee. After the dogs up in the vehicle searching, he was finding nothing. There was no findings of human remains or blood. Reporter a disappointing dead end. Investigators have been in and out of this place all day long. Reporter but the cadaver dog was then sent over to the mockbee house to join a search in progress. One dan had consented to. Whatever we asked of dan, he was willing to do. Reporter suggesting either that he wasnt guilty or that he was supremely confident he wasnt going to get caught . Thats right. Reporter while dan was feeling the heat, detectives were pulling numbers off michelles cell phone and tracking down truckers who had delivered to Thermo Fisher. And of course, stahl and mcvay were taking a hard look at the other four names on their initial suspect list. Two men who were the last known to see Michelle Mockbee alive. One, a warehouse worker named joe siegert, had seemed unusually unemotional about michelles death when he was first questioned. He was one of the ones that made it to the top of the list. Joe presents himself as a loner. Kind of a dry, dark sense of humor and personality. Reporter the other guy at the time clock that morning was doug tungate. Doug was a temporary employee. A newcomer to Thermo Fisher and an outsider. We started looking into his past. Saw that he had a couple felonies and some alcohol issues. So we thought, this might be a good guy to look at. Reporter then there was david dooley, the janitor. He and his wife janet had cleaned at Thermo Fisher for years. David was one of the two to find michelles body. Detective mcvay interviewed him the day of the homicide, and really nothing that put him to the forefront of anyones mind. Reporter and last, there was ed yuska. He was the supervisor who called 911 after finding michelle. The blood is right by her office door. It looks like she never got in her office. Reporter detective stahl found out that ed yuska had some health issues. The thought that ed could do all this to michelle, drag her down the hallway and get her to the mezzanine logically to us says eds not our guy because he physically probably couldnt have done that. Reporter which made detectives feel comfortable eliminating ed yuska from their suspect list. And so then there were four. Now, how to rule out the next one . The csi team had collected some dna from michelles body and belongings, but detectives knew it would be months before a forensic lab could report whether any suspect was a match. Meanwhile, investigators were starting to scan through a promising new piece of evidence, security video from the warehouses parking lot. Could the clue they needed be somewhere in those thousands of frames of footage . There it is. Coming up it was nerveracking. Another elimination round. This time the lie detector test. And police soon detected something was up. He stops himself at the door and says, no, no, no, im not doing this. Even if she gets a stain shell wear it for a week straight. So i use tide to get out those week old stains and downy to get it fresh and soft. And since im the one who has to do the laundry, i do what any expert dad would do. I let her play sheriff. I got 20 minutes to life. You are free to go. Tide and downy. Great on their own even better together. Whats that, broheim . I switched to geico and got more. More savings on Car Insurance . Yeah brofessor, and more. Like renters insurance. More ways to save. Nice, brotato chip. Thats not all, brotein shake. Geico has motorcycle and rv insurance, too. Oh, thats a lot more. Oh yeah, im all about more, teddy brosevelt. Geico. Expect great savings and a whole lot more. Sfx knocks on door. Oh my gosh, stephanie were, honey . So goth. Im dying my hair, mom. Hair dye . Honey. Its just purple. Teenage daughter . Get scrubbing bubbles. Kill 99. 9 of germs and destroy grime. With scrubbing bubbles for 100 problem solved. Everyone loves the way dark clothes make them feel. And no one wants that feeling to fade. Thats why theres woolite darks. Its free of harsh ingredients, keeping dark clothes looking like new for 30 washes so your love for dark clothes will never fade. Woolite darks. Mother of two michelle mock bees family funeral brought her family some comfort. In your mind, youre like, she touched this many peoples lives. Soon red ribbons popped up in honor of michelle. But still couldnt answer the familys questions. I feel like were kind of in limbo. We didnt know what this was all about. We didnt know if it was somebody after our family, why they would be, we dont know. Early on, the investigation had yielded frustratingly few clues on the four remaining lead suspects, but the detectives commander kept up hope. I knew once we can get that just one little bit of lead on this investigation it would open, many, many doors. Hov and his team of detectives were hunting for the next lead, by scanning through hours of security footage of the thermofisher parking lot. We had several eyes on this video. And stahl decided to turn up the heat on the four, starting with the husband, dan. We asked him, would you take a polygraph for us . You agreed to take the polygraph. Yes, sir. Thats a scary thing. Because if it goes wrong, all of a sudden theres a case against you. Right. It was nervewracking. I mean, i took a deep breath like this an the guys like hold on, hold on. You cant do that. You know, its registering on the sensors. And youre like what if i took a deep breath at the wrong time . Reporter but dan told detectives he was eager to be put under the microscope. Please. Do all this stuff so you can figure out that i have nothing to do with this so you can go find whoever did this. Reporter dan mockbee passed the polygraph. And this time, the husband didnt do it. And so then there were three. And around that time, major huff and his team spotted something they thought was unusual on the security footage. There it is. Reporter a vehicle in the parking lot, not entering, but leaving, around the back of the building. A bright red, fire engine red, chevy pickup truck, twodoor. Thats not a normal route for any employee to take. Reporter detectives matched the truck to its owner, david dooley, the janitor. Dave dooleys truck is seen leaving the parking lot at 6 31 that morning. Reporter right after the murder . Thats right. Thats right. Reporter and detectives could tell from the security tape that dooley had returned to the warehouse around 7 00 a. M. , in time to be with ed yuska when he discovered michelles body. Detectives went to the apartment david dooley shared with his wife janet to ask where he went during that halfhour trip. They got there at 6 00 about 6 30 in the evening. And i kind of figured it would happen just to do a followup. He told me why he left the building. That he was trying to call his wife. She wouldnt answer the phone. My wife does take ambien to help her sleep at night and i went home to check on her, make sure she was okay. Reporter his wife, janet, said her husband often worried about her health and would check in on her. He drives me crazy with, janet, did you take your medicine . Janet, did you take your vitamins today . Thats just the kind of person he is. Hes a very sweet guy, a loving guy. Reporter but detectives wondered, did he really come home to check on his wife . Or to get rid of evidence . We started working on a search warrant for the residence and for the truck. Reporter you execute those search warrants and you find bloody clothing . No bloody clothing. Reporter bloody foot prints . No. Reporter stuff taken from the crime scene that shouldnt be at the house . No. Reporter some kind of murder weapon . No. Reporter are you thinking now, okay, maybe this isnt the guy . While theyre searching the house, they collected some clothing, and then, just some other odds and ends. But nothing that directly tied Michelle Mockbee to him. Reporter so investigators kept working. They asked two other suspects, joe, the warehouse worker, and doug, the temp employee, to take polygraphs. Both men agreed. Both passed. Two more names scratched off the list. Detectives had also asked david dooley to take a polygraph. And he said, yeah, ill take one. Reporter but when they brought him down to headquarters we walk him in, and detective mcvay says, this is our polygraph operator. And he stops himself at the door and says, no, no, no, i did not agree to that. I did not agree to this. Im not doing this. There was no asking me to do it. It was sit down and do it. I said, well i want to do this with an attorney. Reporter dooley didnt take a polygraph at a later time either, but he says that wasnt his fault. I did offer to take the polygraph, and they said its too late. Reporter over the next few months, detectives focused in on dooley. Significantly for detectives, he was the only one they could ever identify who left the building around the time Michelle Mockbee was killed. After eliminating other suspects, detectives now believed theyd cracked the case. In september 2012, the boone county Sheriffs Department arrested david dooley. Just very glad hes behind bars. Thats where he needs to be. As to why this happened, we have no idea. Reporter and then there was one. I didnt know what to say. I didnt know what to do. I was never going home. Reporter you want to stop a minute . Its fine. I knew i was never going home, and i was upset. Reporter did you tell them they had the wrong guy . Yeah, i did. Reporter didnt do any good . No. Reporter but then, the longawaited results from the dna found at the crime scene came back from the forensic lab. It turned out, david dooley was not a match. And in the local media, janet called for him to be freed. Weve been telling everyone he didnt do this. Nobody deserves to be accused of a crime of this magnitude without something to prove that he did it. Reporter but even without forensic evidence tying david dooley to the crime, prosecutor linda tally smith remained confident, deciding to move forward with the case. In september 2014, david dooley went on trial for murder. The truth is, there is no smoking gun. There is no one fingerprint. Theres no eyewitness. So what did the prosecutor have on david dooley . Coming up our belief has always been that david dooley was in the middle of breaking into her office when she came up the steps and surprised him. A breakin . What was he after, and how could he have managed a spotless escape . Got a clean pair of jeans. Clean shoes. When dateline continues. Well the squirrels are back in the attic. Mom . Your dad wont call an exterminator. Can i call you back, mom . He says its personal this time. If youre a mom, you call at the worst time. Its what you do. If you want to save fifteen percent or more on Car Insurance, you switch to geico. Its what you do. Where are you . Its very loud there. Are you taking a zumba class . Recently weve noticed some ads created by these two birds, inviting you to stay away from the streak free shine of windex. Well dear windex users these ads are false. Sfx squeaks from Window Cleaning clean glass is better than dirty glass. Dont stand for dirty. Use windex. 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Kill 99. 9 of germs and destroy dirt and grime. You only need scrubbing bubbles disinfecting cleaners for 100 problem solved. We work hard, so you dont have to. Sc johnson, a family company. The 88th southern parallel. We had traveled for over 850 miles. My men driven nearly mad from starvation and frostbite. Today we make history. Bienvenidos welcome to the south pole if youre dora the explorer, you explore. Its what you do. What took you so long . If you want to save fifteen percent or more on Car Insurance, you switch to geico. Its what you do. You did it, yay reporter Michelle Mockbees favorite color had always been red, and since her death her family has worn red in her honor. Youre all wearing your red wristbands today. Yes. They say, michelle ann mockbee, in our hearts. 19692012. Reporter that was your idea . Yes. Just a Little Something to remember her by. Reporter there was a sea of red each day, as michelles family and supporters flowed into this Northern Kentucky courthouse whe david dooley faced trial for her murder. On may the 29th of 2012 dan mockbee lost the love of his life, and two little girls lost their mom at the hands of a man who couldnt even keep his story straight from one day to the next. Reporter prosecutor linda tally smith began by telling the jurors they wouldnt hear about any smoking gun, but they would hear david dooleys own words which she said had made him the last man standing in the detectives process of elimination. It was through this process that the path kept turning back to one person, the defendant, david dooley. Reporter the prosecutor explained that at Thermo Fisher, warehouse employees used handheld scanners like this one on the job, and the scanner data could help locate where employees were around the time of the murder. We were able to create, pretty much so, a time record of where everybody was and what they were doing at different points during the morning. Reporter jurors heard that almost all the employees were working on the warehouse floor, far away from the upstairs office area where michelle was killed. But where was david dooley . Because he was the janitor, he didnt use a scanner. Which meant, said the prosecutor, he could have been upstairs near michelles office during that critical time. David dooley was captured on security video that morning. Theres the red pickup truck. Reporter his red truck was seen leaving the Thermo Fisher parking lot. The defendant actually left the building that day at 6 31 a. M. , which was about a half hour after michelle walked into the building. Reporter the prosecutor filled in what she believed happened between the time Michelle Mockbee arrived and when david dooley left. She entered the warehouse, gathered the time cards from the time clocks and headed upstairs into the offices to do her work. Reporter the prosecutor showed the jury a photo of fresh pry marks on michelles office door, which she said indicated an attempted breakin. Michelle, youll remember, had come in earlier than usual that morning. Our belief has always been that david dooley was in the middle of breaking into her office when she came up the steps and surprised him. And ultimately she was assaulted and restrained. Reporter because she was a witness the a crime in progress . Absolutely. Reporter the medical examiner said michelle was bludgeoned to death with something similar to an industrial packing tape gun. But after such a violent attack, why was no blood evidence ever found on david dooley . And why wasnt any of his dna left at the scene . The prosecutor argued thats because the janitor worked every day with cleaning supplies and plastic bags. Perfect for removing evidence of a crime. At the time david dooley attacked michelle in that hallway what did he have with him . A rolling crime scene cleanup cart with a trash bag in the middle of it. Its my personal belief that when he left that building he took with him a bag containing all of the evidence that was missing from the scene. Reporter but you never found any of that stuff . Never found any of it, no. Reporter and once dooley was back at the warehouse, detectives recalled, he looked noticeably fresh. This guys the janitor, but hes really clean. Hes got a clean pair of jeans, clean shoes. Reporter a coverup so spotless only a janitor could manage it, said the prosecutor. It was only his story, she said, that was a mess. Its very hard for a person to explain how they cant tell the same story twice. And in these circumstances we had four separate statements from him. And he never told the same story twice. Reporter detective mcvay testified it was what dooley didnt say in his first interview on the day of the murder that made them take a hard look at him. At any time did he tell you that he left that building . No, he did not. During that first interview, did he tell you that he was one of the people who found Michelle Mockbees body . No, he did not. Reporter mcvay says it was only in dooleys second interview at his apartment that he first mentioned leaving work and going home. And i came back here. Okay. What time did you come back here . 6 30. I couldnt get hold of my wife. I came home to make sure she was okay. Reporter but detective stahl says dooleys wife janet told stahl something different. I ask her specifically if dave ever came home that morning, and she says no. Reporter in a later set of his and hers interviews, janet did say david did come home to change a pair of ripped pants. He had to come home and, you know, just grab a pair of pants. Reporter it sounds like an alibi. Except david dooley adamantly denied doing that. I never said that. Okay. You didnt rip your pants . No. Reporter however, jurors heard that a warehouse coworker also remembered dooley talking to him the morning of the murder about ripped pants. He had a conversation in which he said that he had to go home and change his clothes because he had ripped his pants. Reporter while the prosecutor had focused on david dooleys own words and that suspicious drive away from the murder scene, next the defense was about to point out to the jury all the hard evidence investigators didnt have on david dooley. Dna evidence, murder weapon, blood evidence, marks on david dooley. Reporter and the defense would ask who else might have more of a reason to want michelle dead. Coming up did you have anything to do with the death of Michelle Mockbee . No, i did not. I did not kill her. Mystery dna. A possible intruder . A husband on the stand. So many questions. And a final bombshell from the prosecutor. Reporter jurors had listened for twelve days as prosecutors laid out a very circumstantial case against david dooley. So circumstantial that his Defense Attorneys chris roach and tom pugh say they sometimes wonder why dooley was even on trial. We were trying to figure out exactly what they were saying linked david to this murder at all. The one thing that we could see that was bad for him at that point was just that he went home that day. Reporter in Court Prosecutors had focused on that trip home and, according to detectives, that dooley never mentioned the trip in his first statement to them. But the defense said because that interview wasnt recorded, what can anyone really know about what was or wasnt said . Without actually having his interview, now were going based on one detectives notes saying that he didnt go home that day. Reporter david dooley says he knows what he told them. I did tell them i went home. I was always very adamant about that. Reporter dooley never testified in front of the jury, but he did talk to dateline about the case against him and his story that differed from his wifes. You say you went home to check on your wife. They talk to your wife, and she says he never came home. Then later, in a separate interview she says he came home because he tore his pants and he came home to change his pants. So whats the truth and why cant you and your wife agree on the same story . We do agree that i came home. I have never heard an interview where she said that i did not come home. This was his testimony. Reporter the detective . As far as im concerned, yes. As far as im concerned it is not the truth if it cannot be factually proved. Reporter did you go home to change your pants . No, i did not. Reporter why would your wife say that you did . I do not know. Weve talked about that a couple of times. And the only thing we ca thanks for joining us. Political gravity and every prediction of his imminent collapse. 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