A lot to cover tonight starting with cnns rene marsh. Reporter this was the lastknown location of flight 370 over the South China Sea as civilian aviation radar suggests. But now a dramatic new turn of events. A malaysian military source tells cnn their radar shows the plane may have still been flying an hour and ten minutes later. Instead of being off to the east coast of malaysia, it apparently turned to the opposite direction and flew to the malaka straits west of the peninsula. Its lastknown location according to the Malaysian Air force was just over this small island called pulau parak. Adding to the mystery, why were the transresponders in the cockpit used to tract plane turn turned off . You have to very a very deliberative process to turn the transresponder off. If somebody did that in the cockpit they would do it to disguise the route of the plane. Reporter Malaysian Police are now looking at three areas, hijacking, sabotage, and psychological or personal problems with the passengers or crew. Was there someone unauthorized in the cockpit, ordered the transresponder turned off, ordered the plane a 90degree turn off course . Did one of the pilots do it themselves. Reporter authorities now say theyve identified the two passengers traveling on stolen passports. Theyre not believed to have any ties to terror. One of the passengers, 18yearold pouria nour mahammad mehrdad was trying to get to germany where his mother lived. The other was delavar Syed Mohammad reza. Malaysian officials have been asked about inflight protocol and say cockpit doors are always kept closed during flight. One woman told an Australian News magazine the copilot of the missing plane allowed her and a friend in the cockpit in 2011. They say they were in the cockpit for takeoff and landing and were invited to spend time with the copilot in kuala lumpur. An airline statement says they are shocked by the allegations and unable to confirm the authenticity of the photos. As searchers look for the missing plane, aviation authorities are looking at many other possibilities besides a criminal act. Could the pilots have been incapacitated due to loss of oxygen . Could there have been some sort of massive mechanical failure, or could the military radar have tracked Something Else besides this plane . Rene marsh, cnn, washington. Todays dramatic shift in the investigation, the possibility of a drastic change in course refocuses attention on the possibility of hijacking as renay was saying either by passengers or a crew member as in the Ethiopian Airlines flight just a few weeks ago. For more on how criminal investigators in the Counterterrorism Community is pursuing leads i want to bring in our chief National Correspondent jim sciutto. Jim, how are you reacting to this new information about the transresponder and radar contact . Reporter theyre reacting by saying these are all leads, all theories that need to be checked out. And if possible substantiated. You had the director of the cia, john brennan, speaking in public today saying the cia has not ruled out terrorism. I asked him a question. As hes sitting there speaking i get word for the first time reading my blackberry news about this transsponder being switched off. He said thats a question that needs to be answer and checked out. He said there were a number of things including the change of direction we see on the map and even mentioned the stolen passports which is a lead they followed. That turned out not to have a terror angle. Theyre checking out all the questions. I cant understand why on day four its now were hearing from malaysian military about this radical change in direction. There have been reports about a change in direction days ago but nothing this extreme going basically the opposite direction. Has the u. S. Have u. S. Officials known about this radical change in course . And has their assessment of potential involvement of terrorism, has it changed at all . Reporter well, to my knowledge they did not know about this change in course. There are even questions about this. You have others in the Prime Ministers Office who are saying that this data about going over that island there at the end is not information that they have. And its remarkable as you say that the military would have known this from the moment the plane disappeared and only to share it today, a tremendous mystery. But intelligence officials i talked to, their position has not changed. They still say they have nothing to indicate this was terror to this point. They are checking out all leads, and as the director of the cia john brennan said, they have not ruled out terror but they havent seen anything including this new information today that leads them to say terrorism, doesnt mean theyve ruled it out, doesnt mean they might change their minds at some point. But to this point they dont have a substantial tie. Jim sciutto, appreciate the update. Weath joining us is shawn henry, president of former assistant director of the fbi where he was responsible for cyber and international divisions. David galla of the National Oceanic and air institute. Leading of the search for ethiopian flight 447. Peter, let me start with you. What do you make of the news that the transponder was turned off and the plaecne made this significant turn . How easy is it to turn off a transponder . Its not difficult and pilots can do it. Although the circumstances of them being able to do it or wanting to do it is simply inexplicable. They wouldnt want to do that. You dont want to fly blind to your air Traffic Controllers and to other aircraft. The real problem in this so far, anderson, is how the investigation is being conducted. This is a militaryled investigation. There are protocols and theres a treaty signed that should be governing this investigation that would allow other countries to step in and give assistance that we have a standing to do that. And so far the malaysians have chosen not to exercise that treaty. Its being run by the military. And weve got real chaos. Do we know why they havent exercised that treaty . Is it a point of pride . Well, theyre a signatory to the treaty. This is the International CivilAviation Organization annex 13. And if you have an accident, it sets out the protocols. The ntsb would be the american accredited representative there. They have not been involved yet in helping the malaysians. David, you say that this is turning to really one of the biggest mysteries of all time. Are you encouraged by this new information, the new focus on the straits of malaka and do you understand why it took this long for the information to come out . Anderson, the one thing we have to go on is solid facts, the real evidence. And that to me up until today was the lastknown position of that plane. If i had a team on the sidelines waiting to go with a ship mobilized with search gear, this would be really frustrating to say not only is it not here in the spot we thought it is, its in another ocean out on the other side of this peninsula. I mean, truly frustrating. But on the other hand, youve got to go with the most unturned theory that plane has to be someplace and they need to check out the leads. Really frustrating and really perplexing. Just because that was the last place according to these malaysian military that it was on the radar, that doesnt necessarily mean that something happened to it in that spot. It could just be at that point, shawn, flying below radar. Yeah. Thats true. Shawn go ahead. Thats right, anderson. You dont know until you actually find the physical evidence. Building on davids point, there are four competing theories of whats occurred here and weve really got to look at all the facts whether it be terrorism, hijacking, pilot error or mechanical failure. At this point without any real physical evidence i think youve got to look at all the people that are involved. Three of those competing theories that are people that would have been involved in those first three and perhaps even in a mechanical failure there may be people involved. I think from an investigative perspective youve got to look at who the people were, the people that were on the plane, the people that were on the ground, the pilots in that aircraft. And youve got to chase those facts fully to try and develop this to full conclusion. But shawn, in terms of mechanical failure does it make sense that the transponder would be turned off . Is that possible just with mechanical failure the transsponder would stop working . It could. Peter does that jibe with what you understood as well . Theoretically it could. But the 777 has multiple redundancies for this kind of potential failure. As a last resort it has whats known as a ram jet generator. They can drop this generator. It deploys beneath the aircraft. And the forward speeds generate enough electricity to run their basic avionics and to run their trn their transponder transponder. Its very perplexing. I talked to an in many of former pilots all who believe something catastrophic and quick must have happened. If what we now have learned today about this change of of direction, the plane flying in the completely opposite direction is true, does that rule out something catastrophic . The fact that the plane was able to change direction was able to continue to fly . Well, it implies thought was under some sort of human control. And thats the issue for the malaysians to start getting other people involved in the investigation. To start looking, getting other experts to review the radar tapes, to review making inquiries. Whose radar was turned on that night . Were there any war ships in the straits that had their radar turned on . We need to get as much evidence as possible from the radar to help us figure out where this plane is. David, you point out that the straits of malaka are relatively shallow. But if a plane turned and ended up in the open sea to the north even the depth there get much deeper. Yeah. In the gulf of thailand and the southern parts of the straits its fairly shallow. In fact its shallower than the length of the plane. So if the plane was standing on its nose it would be sticking out of the water. But if you get into the andeman sea youre in 2 1 2 miles of water and thats a whole different ball game. At the end of the day, anderson, what its going to come down to with no witnesses, not a lot of evidence, weve got to find that plane and retrieve those black boxes with the hope that the information is on those black boxes. As you know better than anybody, that can take years. It took i think two years in the air France Flight that went down between rio and paris. Yeah. I was hoping against hope that air france was in a remote area in very deep water. 13,000 feet. Rugged mountain range. Right. And in this case its in a heavily trafficked area, not remote, very shallow water. So i was hoping that wed find that x marks the spot of the haystack and then the pieces of the needle would be fairly easy to find. But again its incredibly perplexing. Shawn, if this was a terrorist act, obviously or generally, typically, terrorists do like to claim credit for it or some sort of a video would be released. I mean, terrorist act is all about making an impact, political statement, some sort of Public Statement. If nobody knows its a terrorist act its not much of a statement. What do you make of that . I think that you still cant rule terrorism out but that is one of the questions that a lot of folks have is why hasnt there been some Public Statement made. That is typically on the heels of a terrorist organization looking to strike fear in the hearts of citizens. They want to proclaim that they were behind it. So that certainly is a concern here. But i agree with some of the other folks in the Intelligence Community that until youve got collected all the facts you certainly cant rule that out. There might be another reason for them not coming forward at this point. If this were perhaps if it was a terrorist incident, and im purely speculating, this was part of a much larger or broader potential act and for whatever reason they wouldnt come forward at this point but at a later time. I see. So youre saying if again it was part of a terrorist act and part of a larger operation that operation may be under way or about to take place and therefore they wouldnt want to tip their hand. Thats certainly a possibility. Speculation of course. Right. Again we just simply dont know at this point. Shawn henry, david galla, peter galls as well. Follow me on twitter using ac360. Coming up next well continue to follow this investigation. Well take you to kuala lumpur where complaints about the governments handling there, malaysian governments handling of the investigation are growing particularly among the families who are so desperately weight. Well also look at some of aviations toughest mysteries, how they were solved and why some became the focus of all kinds of extreme theories. Well be right back. Ameriprise asked people a simple question in retirement, will you outlive your money . Uhhh. No, that cant happen. Thats the thing, you dont know how long it has to last. Everyone has retirement questions. So ameriprise created the exclusive. Confident retirement approach. Now you and your ameripise advisor can get the real answers you need. Well, knowing gives you confidence. Start building your confident retirement today. Youre an emailing, texting, master of the digital universe. But do you protect yourself . Apparently not. When you access everything, you give everyone access to everything about you. But thats ok. While you do your thing. [ alert rings ] well be here at lifelock, doing our thing. Watching out for things your credit card alone cant. [ alert rings ] and relentlessly protecting your identity. Get lifelock protection and live life free. [ alert rings ]. And let in the dog that woke the man who drove to the control room [ woman ] driverless mode engaged. Find parking space. [ woman ] parking space found. [ male announcer ]. That secured the data that directed the turbines that powered the farm that made the milk that went to the store that reminded the man to buy the milk that was poured by the girl who loved the cat. [ meows ] the internet of everything is changing everything. Cisco. Tomorrow starts here. Theso you can get outthing of your element. Rything. So you can explore a new frontier and a different discipline. Get two times the points on travel and dining at restaurants from chase sapphire preferred. So you can be inspired by great food once again. Chase sapphire preferred. So you can. To truck guys, the truck is everything. And when you put them in charge of making an unbeatable truck. Good things happen. This is the ram 1500. The 2014 motor trend truck of the year and first ever backtoback champion. Guts. Glory. Ram. I dbefore i dosearch any projects on my home. I love my contractor, and i am so thankful to angies list for bringing us together. Find out why more than two million members count on angies list. Angies list reviews you can trust. Developments in the search for flight 370 there are no answers just questions. Human nature has a tough time with that. Not knowing is certainly hard and difficult. People want to connect the dots even when there are no dots to connect. Thats why as these kind of case proceed along with the false leads and blind alleys and unsolvable mysteries you see Wishful Thinking and fantastic scenarios. Reporter with the wreckage still missing, speculation isnt. Theories of what happened to flight 370 are swirling all over the internet, mostly over social media sites like twitter. Its accelerated in recent years because of the internet and because in this case of the International Aspect of the story where you have people piping in with their conspiracy theories literally from all around the world. Reporter late yesterday, a theory rocketed around the internet about phone calls from family members for people who were on the plane. Relatives said they could tell the phones of the missing were still on by checking a popular chinese instant mess enger Service Called qq. Relatives also saying when they dialled some passengers numbers the phones would actually ring and not go straight to voice mail, indicating they were indeed on. Were they turned on because passengers were trying to make frantic calls, Something Else . According to the washington post, the desperate families demanded answers from the airline but were ignored. Its a fairly rare event when a major airliner happens. When that happens people suspect horrible foul play was involved. Reporter another theory, a meteor took the plane down. There was a known meteor in the area at the time the plane took off. So could it have hit the plane . Given what we know about the erratic flight path, highly unlikely. And then theres the idea of the miraculous might have happened, that the plane somehow landed near the rocky outcrop of an island called pulau perak and the passengers are still alive. A close look at the island shows how forbidding the place really is. And the approach to the rocky coast would be treacherous. And the steep walls would make the idea of anyone climbing from the wreckage to safely ex exceedingly difficult. You can see structuring at the summit of the island. Is there anyone inside . Doubtful. But it does give the families and loved ones of the passengers a place to put their hope. Pamela brown joins us now. The lack of information and the conflicting stories coming from the malaysian government, thats obviously driving some of these stories. People come up with their own theo theories as to what happened. Reporter thats certainly sort of fuelling the fire. People honing in on the erirregularities, oddities you see that they do in any disaster to weave together a larger theory that would help them make sense of it. When you have a dearth of information like in this case people want to fill that vacuum with their own theirries like 9 11, the Jfk Assassination and other plane crashe weve seen. Its a way for some people to create order in the universe and believe that bad things dont just happen, they happen because bad people make them happen. You can bet, anderson, as the time passes on and this still remains a mystery people will continue to come up with their own theories as to what happened here. Pamela brown, thanks very much. Again we simply dont know. It very well may be some sort of act of terror, some