Underwater pings are not from the planes black boxes. The entire search for nearly two months has focused on hunting where those pings were heard. Its a stunning setback, and rene marsh broke the news. And rene, wow is really all i can say right now. I pretty much said the same thing today, erin. I said wow when we learned this information, because it all boils down to this. For seven and a half weeks, weve been searching for something that simply was not there. The u. S. Navy is on camera and talking to cnn tonight. We are told the black boxes were not in the search zone, and most likely neither is the plane. It was the most promising lead, and now we know its false. New information the u. S. Navy has concluded these four underwater signals were not from the missing planes black boxes. From the u. S. Navys standpoint, these sounds were most likely not from the black boxes. Yes, id have to say at this point, based on all of the imagery data weve collected and looked at. If that black box were nearby, we would have picked it up. Reporter when detected in april, the pings boosted confidence the plane would be found. The full signals previously acquired taken together constitute the most promising lead. Reporter but now the navy says the sounds doh could have been from the search ships itself or other electronics. We may very well have been in the wrong place. But at the end of 30 days, there was nothing else to listen for. Reporter after searching 329 square miles of ocean floor, the bluefin 21s mission is over. The search continues in august when private Companies Take over. Meantime, a new potential lead. Cnn has learned a sound that could have been the plane crashing was detected by underwater microphones. Our analysis is designed to detect Nuclear Events and earthquakes. And my understanding is yes, with a view to finding if there is any evidence from impact from the malaysian aircraft. Reporter the United NationsNuclear Test Ban organization has a network of 11 hydrophone stations that pick up many sounds, even ice breaking thousands of miles away in antarctica. But could it hear a plane hitting the water . Its possible. But the circumstances that would allow it would have to be very particular. Reporter well, this is a long shot because the data from the signal detected appears to be inconsistent with other data about the position of the plane. Nevertheless, scientists continue to analyze it because this just goes to show they are trying to follow up on every possible lead to find something, find some sort of wreckage. And they tell us that theyre hoping to share their findings in the near future. Erin . Rene, thank you. Now joining me Richard Quest, jeff wise and mary schiavo. Its been 83 days. These were the linchpin of much of the search the past two months. Theyve been looking because of these pings. This is a big development. It is. But you are excluding an area now. It is devastating that its not there. But the important thing of course is theyve discovered its not there or that the pings are wrong after the event. Am i making sense . It doesnt really matter now that we know they werent the right pings because theyve already searched the area. Yes, it was a waste of time to search it, but now we know they werent the pings, we can refocus and start to look at exactly where the search might perhaps move forward, which is back to the arcs. Back to the, a based on the inmarsat data. Yes. Jeff, youve been very skeptical. Not just to the inmarsat data conclusions, but of the pings themselves. Right. Everyone wants to find this plane. But your concerns have been justified now. Right. I mean, basically, all along, ive been saying what a lot of other people have been saying as well. Its simply that the pings did not match what we expected to hear from the black boxes. The frequencies were wrong. And the distribution on the sea floor of the pings was incompatible with what we would expect the find from the black boxes. And what really the only reason i think that any of us gave credence or the credence that we did to these pings was that the authorities were staking their credibility on their association with mh 370. So really, it became an acid test for the credibility of the authorities. They said in very Strong Language that we would soon fine the plane. So for me this isnt really about whether these pings are real, but how much faith do we have in the credibility of the authorities. Because the only reason that we believe that the plane is in the south at this point is because the authorities have staked their credibility again on that. No, they havent staked their credibility on that. Okay. Ill take issue on that. Okay. That turns it into a slinging match if you like between the authorities and everybody else. They have not staked their credibility on it. They staked the fact that they believe it to be true, which is not the same thing as we are credible and you are not, so to speak. They basically said in the extremity of the moment. Okay. That we believe this to be true. Now, what we have learned today is that its not true with the pings. And yes, weeks were wasted by looking in that area. 50 days were wasted. But they have nothing else to go on. Lets not be too clever after the event here. They had nothing else to go on. Although based in part on the inmarsat data and the pings started to add up and add up. And as a result, they didnt look anywhere else. They havent been looking in other locations because of this. Hold on one second. Mary, i know you thought these were the pings, along with a lot of people, most people. What about the frequency was never right. The standard for the plane socalled black box 37. 5 kilo hertz. The frequencies were all lower than that. They picked some of these up for hours and hours and hours. What else would they have been . Well, you know, now the navy is explaining it might have been some frequencies from the ship, from the towed pinger locator itself. Im still skeptical about trackers on marine life. But theyre saying from the very equipment itself could have caused these pings. And many of us were asking all along is someone checking what happens to a pinger underwater for 30 days. We have now had three months. They could have checked it twice. Does a 37. 7 kilohertz pinger degrade under water pressure to 33. 3 . And now apparently well never know that because these werent the pingers anyway. But that would have been a very important question to answer, particularly now that they say its universally accepted, interesting term by the navy, universally accepted by the search teams that these were not it. Richard, how do you go from publicly saying were basically sure these are it and were looking here to we are now universally accepting these are not it. What if it is it . Because theyre doing it in extremis. Theyre doing it urgently. Theyre doing it with a deadline of 30 days that is about to expire there is a tight schedule. Does that mean youre also skeptical about the conclusion about the inmarsat that its in the south . Because that was also made in extremis. No because once they have done that work, they then sent it out to other people to check it. That work has been checked by other organizations using the raw data. But why would it take them 50 days after the death of what would be a plane black box signal to say its not . By the way, the guy who made those pingers has been on the show. We called him tonight. He said look, they havent called me yet from the navy so he hasnt commented yet. He had listened and said they sound like his pinger. You were the one who is the skeptic and the cynic. Ill give you that. What im urging everybody else is dont just sit there now and beat up on the fact. When theyre down in the ocean, theyve got nowhere else to search, theyre following the only leads theyve got. Youve got Angus Houston saying very stable, distinctive, not of natural origin. The Australian Defense forces center believed its a description of the flight data recorder. Theyre doing the best they could with what they had at the time. So where it is then . Is everything now on the table . Inmarsat has now put out its data, but not its calculations. Right. So . I would like richard and everyone else in the world to get their head around the fact that we have no reason to think that the plane went south except for the say so of inmarsat and the search authorities. And if we cant trust them to be right about the acoustic pingers, i dont think we should have excessive amounts of faith. Listen, they just recently released what they said was the raw data. That raw data was missing. The key crucial the calculations. The analysis, the algorithm. Et cetera. Very quickly before we go, is everything on the table now in terms of where to look . No, everything is not on the table. But what is important is this is how often air crash investigations go. There have been so many crashes ive been involved in investigating, and you pull out and go over it. Well dont even have the wreckage yet. But you pull out and go over the wreckage time and time again. You throw out theories and investigate them. The most important thing is not to get fixated on the first theory. Its one of the mistakes of investigation. And now theyre going november on to that. Theyre going to use the inmarsat data, because thats all they have and thats the most realistic way to look at it. They need to look for other clues and follow those up. I think theyll still follow inmarsat because there is nothing else. All right. Thanks to all. Outfront next, a cnn exclusive. Were going to hear from the Gun Store Employee who sold Elliot Rodger one of his weapons. 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In fact for some, relief starts in just 15 minutes. Excedrin. Headache. Gone. Take it on the way you always have. Live healthy and take one a day womens 50 . A complete multivitamin with 7 antioxidants to support cell health. Age . Who cares. Breaking news in the killing rampage that left six people dead in santa barbara, california. Tonight for the first time we are hearing from the man who sold 22yearold Elliot Rodger a gun leading up to the shooting. Kyung lah is outfront. She has the exclusive. Kyung, so you have had a chance to talk to him. What does he remember about that sale . This is one of the three guns sold. And this one store did sell one of the handguns. The manager of the store telling cnn that he remembers this transaction. It happened back in february. He remembers the man who would become the isla vista gunman. He says that there was nothing unusual about him, nothing particularly remarkable. They did talk about isla vista. He says that he cleared the tenday waiting period. And when asked whether or not the gun store felt responsible in any way, because this weapon was used in a crime, here is what he told us. It happens from time to time. But what about the guy that sold him the knives or the swords that he used, or what about the guy that sold him the car he was then driving around, hit people. I mean, do they feel bad . Or do they know he was going to do something bad with it . I mean, we sell tools or items. I mean, its no different than the guy that sold him the knife that he used. The manager says we often talk about guns, the regulation of guns, that thats an easier topic to talk about. But there are other more complicated issues at stake here. Erin . Thank you very much. Pretty incredible there what he had to say. I guess the question is what motives someone like Elliot Rodger to kill . He is one of troubled young people who commit heinous crimes. But some say kids who kill can be rehabilitated. Jean casarez has an outfront investigation into the mind of killer teens. She was very easy going. Goofy. And goofy, yeah. Reporter beth brodie was only 15 when she was murdered, beaten to death with a baseball bat. Her 16yearold killer was a boy allegedly upset that brodie wouldnt go out with him. Richard baldwin was tried as an adult for firstdegree murder and given the only penalty possible under massachusetts law, life in prison with no chance of ever getting out. For brodies family, the sentence meant healing could finally begin. I knew that he was going to pay for the crime. And that made me feel better. Reporter now almost 20 years later, a shocking reversal. Its a slap in the face. We feel betrayed, betrayed by the Justice System. Reporter on Christmas Eve 2013, massachusettss highest court ruled that putting juveniles in prison without the chance of parole violates their constitutional rights. At the heart of the issue is the science of brain development. Neurologically, the adolescents brain is continuing to develop. Starting at about age 18, even Serious Violence in serial offenders begin to decrease. So by the time theyre in the mid20s and late 20s, most of them are no longer engaging in crime at all. Reporter to the massachusetts court, it came down to one question. If the character of a juvenile killer isnt fully formed, how can a sentencing judge determine if he or she can be rehabilitated . To the court, that is the decision of the parole board. At hearings that begin when someone has served only 15 years in prison. Among hundreds of cases, this ruling could affect is the high profile killing of High School Teacher colleen ritzer, allegedly raped and murdered by 14yearold student philip chisolm. Chisolm will now be eligible for parole, even if convicted of firstdegree murder. And more than 60 already convicted murderers in massachusetts now suddenly have a shot at freedom. For some prosecutors, that is hard to swallow. We understand the Human Development of the brain. But there are just some crimes so heinous and so abhorrent that you have to take a different tact. Reporter Jonathan Blodgett is the head of the commonwealth District Attorney association. This is a converted conference room. Its now the war room. Reporter the war room . To handle the appeals. Reporter his office is now scrambling to prepare for unexpected parole hearings in 11 cases, some decades old. These are the worst of the worst of the worst. The court on that date and that decision redefined justice for 11 victims. Reporter one of those victims is beth brodie. We have to be the voice for beth, because she does not have it, because he took it away. I mean we have to fight for her. Reporter jean casarez, cnn, salem, massachusetts. Outfront tonight, dr. Jim foulan. You just heard in jean casarezs piece, these killers described as the worst of the worst of the worst. Now the Justice System is saying well, if you committed this crime as a teenager, maybe you changed. Maybe your brain changes. Maybe you wouldnt could it again. So maybe you can go free. Does that make sense . Well, its partially true, erin. But it depends on the kind of murder it is. I dont know of any psychopathic murderer who has been rehabilitated in their teens or as adults. Some people with personality disorders like borderline personality disorders and ones that are related to lack of empathy, these are pretty hard wired into the brain. And so even though we hear about plasticit and retraining, i dont know if thats true. Some people do in fact grow out of things, if you will. But not these people. Not psychopaths and people with personality disorders who are violent. Not people who are committing some of these crimes that are so horrific, you dont even want to talk about them. That case recently in massachusetts of a brutal and violent rape of a teacher and then murder. That is a and these kids, every time they do it, you hear about how they were an honor role student or so nice or so sweet. That isnt a definition of the psychopath that you could have the same things going on at the same time, right . One sounds like he was and one sounded like he wasnt. But we like to think as a culture that we can always bring somebody back. And this laps not to be the case, unfortunately. So it really case by case some people can be and you can look at it. But in many cases it cant. So this omnibus sort of ruling seems quite irresponsible to me. Interesting to use the word irresponsible. I know you have said there are three things that determine whether someone is a psychopath and someone can commit some of these horrible kinds of crimes. Brian makeup and childhood patterns. Two of the three are nature, not nurture. People are born this way . Well people are born with a certain genetic makeup. And many are born with a certain propensity, a sort of brain pattern, a circuit that has low empathy. And it tends toward aggression. But by itself, that isnt enough to create a criminal, a killer. So we say that the genes load the gun and the