Dont run away dont run away dont run away [ cheers and applause ] jimmy all right. Their album, rhye, its called woman and it is out now. I want to thank them, thank marylouise parker. Thanks to idris elba and apologies to matt damon. We ran out of time. Tomorrow night kevin bacon, Diane Krueger and music from the bacon brothers. Thanks for watching. Nightline is next. Good night ,,, tonight on nightline, fatal error . A woman murdered and a bloody crime scene, and a trial that ends with the Death Penalty. We ask, did texas execute the wrong man . Theyre powerful, majestic creatures who have lived in these waters for thousands of years. We go to thailand to find out if it is too late for these endangered fish. And the emmy snub tonight. The emmys are out and you will be surprised who didnt make the from new york city, this is nightline with juju chang. Good evening, and thank you for joining us. It is being hailed as a major step forward for our criminal justice system. An unprecedented federal review of Death Penalty crimes has revealed 27 cases where fbi forensics experts may have helped garner wrongful convictions, often being very complicated. Today, we examined a case that condemned a man to death. But did the state get the wrong man . We go to texas for crime and punishment. Reporter a friday night in corpus christi, texas, a call comes into 911. It is wanda lopez, a 24yearold single mom working as a cashier at a roadside gas station, and she is worried. What is she doing with the knife . Reporter minutes later, wanda lopez calls 911 again. An Armed Robbery going down right now. Reporter lopez is stabbed to death in a vicious struggle. It is just one of many crimes in the country that ends in the Death Penalty. But now, it is raising a provocative question, does the Death Penalty always punish the guilty or are mistakes made . Is it possible our system has killed an innocent man . Carlos deluna. Police rush to the bloody scene and find there is an eyewitness who entered the store just as the killer left. A description is broadcast immediately across radios. As wanda lopez is rushed to the hospital where she dies from a knife wound to the chest, police find lopez hiding underneath a truck, and then he is brought back to the scene, where a witness identifies him. Even though there were no fingerprints linking him to the crime, he becomes the lone suspect. At trial, he identifies another man. But at trial, deluna gets the Death Penalty. And is executed. He swears to his last breath he didnt do it. I just wish somebody would do something about it, and look for the person and do something about it. Reporter no one did until now. Meet james leadman. Do you believe that Carlos Deluna was innocent . I believe that. Looking into it, Carlos Deluna said i didnt do it, i saw another man do it. Reporter a law professor has conducted one of the most thorough reviews of a Capital Punishment case in u. S. History, spending years digging into delunas case in the way no one, not even the police or prosecutors have. Were convinced the state of texas executed the wrong man. Reporter and he believes he can prove it. What we can say for sure if they have have a lot of evidence another man did it and they didnt go look. Reporter that other man is Carlos Hernandez, he says, the man that was identified but prosecutors never pursued. To check out leadmans claims, we went to the texas town rocked by this heinous murder several years ago. This was the scene of the crime, a shamrock gas station and convenience store, but it was here on a lonely night in 1983 that wanda lopez was brutally stabbed to death. And these grisly crime scene photos are crucial new evidence, he claims. We found photographs that were not shown to the jury or defense that we found 20 years later. Reporter one of the most shocking photos shows a detective standing on top of the possible evidence. You can see she is standing right on top of a napkin that was knocked to the floor. Could have a fingerprint on it or blood on it. Reporter she is just tromping on it. Reporter leadman says it is possible the weapon was not found. Carlos, his pants, the white dress shirt, there was not a bit of blood on there. Reporter he also points to a bloody footprint. This is the killers calling card. Nothing was made out of it. Reporter that footprint could have helped to have exonerated Carlos Deluna. Reporter so he was executed without any physical evidence against him. But what about the eyewitnesss . One man stood face to face with the killer, and later was brought to the squad car where he positively idco d him. It is pretty strong, isnt it . No, it is actually quite weak, because people can make mistakes especially in crossracial identifications. Reporter later, he was tracked down, they taped the interview with him. How certain were you that night . Probably 70 percent, it was not 50 50, it was more. But i will say this, one of the Police Officers mentioned we found this guy hiding underneath the car without a shirt on two blocks north of us. If they had not said that would you be less than 70 sure . Yes. About where would you have been if they hadnt said that . About 50 50. Reporter okay, so there was no blood on Carlos Deluna, and now the key eyewitness is doubtful. But now there is this, leadman tusly unreleased tape recording indicating the officers may have chased another man before their attention was drawn to deluna. I dont know if it is another suspect. Reporter but the most shocking new evidence leadman discovered, Carlos Hernandez allegedly boasted he was the killer. He looked a lot like Carlos Deluna, and he liked to use a knife on his victims. One similar found at the crime scene. Two women overheard him bragging but were never questioned. Was sitting on the top of the steps. So we overheard that he, Carlos Hernandez had hurt wanda. He was bragging to the uncle that he had hurt somebody. I was scared because of what i had started to put two and two together and what carlos had done to ms. Lopez. Reporter from the moment he was arrested, Carlos Deluna said he didnt doco it. And later he testified in court that a man named Carlos Hernandez did. But his claims were dismissed by the prosecution. Delunas defense lawyer James Lawrence met us in the same courtroom where he was tried and sentenced to death. He said he tried his best. What do i have to counteract anything, anything, had we had that other tape . Gosh, i got something. Because then you could have said was that the Carlos Hernandez that we have been looking for . Yes. Reporter the Prosecution Team declined to speak with us on the record. Rose roton is delunas sister. It is just that we didnt know how to help him. Reporter she said her final goodbye to her brother on december 7th, 1989, right before he was executed by lethal injection. At the end, he said im innocent. Youre executing the wrong person. Reporter it is what he said all along. There may be a day that the truth comes out. I dont think it is right. Reporter he the dreams until the end, too. I think i will try to remember the word of god. Because i learned that while being here that that is the only way i can make it now. Reporter the death row champion always felt he was innocent and watched him die. He laid down and said will you hold my hand . Reporter what is the lesson for the rest of us . We need to look at the whole picture. What is it accomplishing . It is not stopping crime. Reporter Carlos Deluna is long dead now. Wanda lopez, too, but their tragic story may hold an eternal truth. What i really want to come out of this is make a determination for the public that it is real, that we can take life in a case like this. They have no idea how many other cases out there, there are like this. Our thanks for that compelling report. Ten years after convicted, deluna died, he was 54 and back in prison for attacking a neighbor with a knife. So tell us what you think about the Death Penalty. Tweet us at nightline, coming up next for us, a search for powerful creatures. Stay with us. Abc news nightline brought to you by the new fourdoor fiat, 500 l. [ female announcer ] what does the antiaging power of olay total effects plus the perfecting color of a bb cream equal . Introducing the newest beauty trend. Total effects cc cream c for color. C for correction. [ female announcer ] fight 7 signs of aging flawlessly. Cc for yourself. [ female announcer ] fight 7 signs of aging flawlessly. Youre not made of money, so dont overpay for boat insurance. Geico, see how much you could save. You know, myths about Sea Creatures like the loch ness monster have gripped our imaginations for centuries. And in thailand, not hard to see where these myths came from. And we traveled to thailand for huge fish. Reporter he has been called the fish whisperer, which may not sound like much until you realize were talking about monster fish, like this fish, the jaws, razorlike teeth that can take off a hand. This is like indiana jones, they track down the living creatures. 30 different species that few realize are living in the rivers, they can grow over ten feet long and weigh over 600 pounds. The living fossils, theyre going to be extinct. He invited us to the best place, he says, really the only place in the world were guaranteed to see monster fish for ourselves. We journey to the catch and release fishing lodge. Here, grown men have been known to weep, well, at least shake with joy when they catch something even if they can barely hold it. And for him, it is a life time. Under that surface, there are more monster fish under the surface more than any other place in the world. And in the water, im seeing something coming up for a gulp of air, and then moving out of sight. These are true loch ness monsters, because they do get big, they get ten feet long. Reporter but when he asks if i want to catch one . These are not the little fish at home. Reporter he explains that monster fish are losing their battle to survive in the wild. Here, the anglers are using methods to protect them. This is going to be a sight . Yeah. Reporter but first we wait and wait, with a single bite. When we hear two anglers not far from us have Something Big we go check it out. And this fish, im guessing, is at least a 200 pounder. Reporter it is an arapima, a living loch ness. They dont attack people, theyre just big and powerful. When he wants to get away, we might get hurt. Reporter just as we admire it . Holy moly. That was a close one, with a head like concrete he could have seriously hurt someone, he swims away. Next . Amazon red tail cat fish. A lot of peoples favorite fish because of the colors, really nice pattern on his head, bright red tail, white stripe along his body. Those little moonshaped pads that you see, those are his teeth. Reporter that is light. Theyre not cuddly, but they are kind of cool. Beautiful fish. Yeah, these are really pretty. Reporter back at our spot we finally get a bite. The battle is on, suddenly we get a glimpse. Zeb and the guide know right away. This is a monster cat fish, you have to be careful. Reporter we have a giant cat fish on our line, the king of monster fish. And they are the hardest fish, youre trying to reel in, but youre not even doing anything. Just dont even try to reel in right now, just hold onto the rod. That is your job. Reporter okay, do you want to try he is so powerful we have to keep trading off. Oh, my gosh. But finally with my arms like jelly . Okay, it feels like im trying to pull in a mack truck. The cat fish gives in. Here you go. Reporter it takes three of us to do it, but then zeb hops in the water. And my first monster fish is in my net. There we go. Reporter wow, amazing its okay to just yeah, to just touch him. This is the macong giant cat fish, the cat fish dont have scales. You feel his skin. It is very soft. Reporter a little bit slimy. It is so rare even zeb has not even one in the wild in more than three years. It is a fish that very few people have seen, and certainly in the wild, nobody has ever seen one of these in the wild. Reporter oh, man, no teeth . Yeah, put your hand there. Reporter oh, man, wow. He gets checked out. You feel him reporter yeah, i feel him getting stronger, it doesnt take long for him to recover. Zeb wishes everybody could do this, monster, yes, but also magnificent. These living fossils that still exist among us, just underneath the surface. That is amazing. Fresh fish, and ooh, slime to prove it. For nightline, gloria rivera. It airs fridays. Next, new photos of dzhokhar tsarnaev, who released them and why . Since ive been using crest prohealth, ive noticed a huge improvement. [ male announcer ] go pro for a clean thats up to four times better, try these crest prohealth products together. [ carolina ] the toothpaste is really awesome. It cleans a lot. [ male announcer ] crest prohealth protects not just some, but all these areas dentists check most. This is gonna be a very good checkup. I feel it. [ male announcer ] go pro with crest prohealth toothpaste. Always triclosanfree. After using crest prohealth for a few weeks, i just feel brighter, fresher, cleaner. A friend under water is something completely different. I met a turtle friend today so, you dont get that very often. It seemed like it was more than happy to have us in his home. So beautiful. Avo more travel. More options. More personal. Whatever youre looking for expedia has more ways to help you find yours. Details are really important during four course. I want to make sure that everything is perfect. Thats why i do what i do. [ male announcer ] its red lobsters just 14. 99. Start your feast with a choice of soup, then salad, plus biscuits next, choose one of nine amazing entrees like new coconut and citrus grilled shrimp or linguini with shrimp and scallops. Then finish with dessert. Your four course seafood feast, just 14. 99. [ mortazavi ] everything needs to be picture perfect. Im reza, culinary manager. And i sea food differently. Ill just press this, and youll save on both. Ding ladies and gentlemen, boys and girls, llllets get ready to bundlllllle. [ holding final syllable ] oh, yeah, sorry lets get ready to bundle and save. Now, thats progressive. Oh, i think i broke my spleen Home Insurance provided and serviced by third party insurers. Tonight on feed frenzy, that Rolling Stone cover continues to spark outrage, and one photographer decided to take things into his own hands. Targeting tsarnaev, just as the controversy over the Rolling Stone cover of the Boston Marathon bombing suspect sparked outrage and boycotts. Photos from the night of tsarnaevs bloody capture. He said that the images makes it glamorous. Emmy snubbed, netflixs house of cards, the first series to nab an emmy nomination for drama today. But it was the academy snub that had us saying wow. Foxs new girl, the fan favorite that snagged multiple nominations last year didnt get a single nod. Neither did the most watched cable drama, amcs the walking dead. Cruising down memory lane