A lot, both on and off camera. Our justice correspondent pamela brown is in fort hood. Pamela, what is the latest tonight on what youre hearing . Reporter well, a u. S. Military official with direct knowledge of the investigation telling our Barbara Starr that that traumatic brain injury that lopez had reported actually came from a reported fall during patrol, not from a traumatic event related to combat. And john, we learned from military officials today that there was an argument that escalated between lopez and another soldier in the moments right before this shooting. Officials believe that was the impetus. And according to a father of one of the victims, it all started over a leave request form. Cnn has learned in the weeks before his deadly rampage at fort hood, Army Specialist ivan lopez was creating a stockpile of ammunition. Sources say when lopez bought his. 45 caliber semiautomatic handgun at this store, guns galore in killeen, texas on march 1st, he also purchased what one source calls a large amount of ammo. Cnn has also learned the 34yearold returned to the store repeatedly to buy even more bullets. Its the same place where major nidal hasan bought the weapon he used in the 2009 fort hood attack. The army said it now thinks the shirting started as a dispute with another soldier. We believe that the immediate precipitating factor was more likely an es escalating argument. Reporter he went to a base personnel building wednesday to pick up a form to request time off. The father of jonathan westbrook, one of the soldiers injured in the attack, says after lopez was told to come back on thursday he snapped, returning a short time later with his gun. The first guy he shot right in front of my son was killed. Then he turned the gun towards jonathan. Aimed it and fired. Reporter investigators are still trying to piece together an exact motive of the shooting and why lopez came on base armed. Tonight theyre looking at evidence such as his gun, extra ammunition, his reported Mental Health issues, and the medications he was prescribed like the sedative ambien. On capitol hill, Army Officials told congress that while lopez, an iraq war veteran, had a Spotless Service record, he also appeared to have an unstable psychiatric condition. He was seen just last month by a psychiatrist. He was fully examined. And as of this morning we had no indication on the record of that examination that there was any sign of likely violence. Reporter sources tell cnn police searched the apartment where lopez has recently moved with his wife and young daughter but have found no evidence such as a suicide note to explain the shooting. And pamela brown with us again. Pamela, today for the first time we heard from lopezs family. What are they saying . Reporter thats right. Lopezs father breaking his silence for the first time in a statement, john. He said he is astonished, he is saddened by what happened, and said my son must have not been in the right mind. He was not like that. He also talked about his sons medical treatment for his Mental Health and the passing of his mother and grandfather and how that affected his existing condition. But despite reports that lopez only got 48 hours to go to puerto rico for his mothers funeral this past november, a military official with direct knowledge of the investigation telling cnn that the army actually offered him the full leave to attend his mothers funeral, which is ten to 14 days, but that lopez chose not to take the full leave so that he could go to Truck Driving school. Military officials making it clear today, john, that we may never know the full reason of what caused lopez to snap. No. But some of those details do seem to be coming in now. Pamela brown at fort hood for us, thanks so much. Out of the three killed and 16 wounded, Sergeant Jonathan westbrook was among the first to be shot. We heard a bit from his father in pamelas report. He was hit three times. But despite that hes making a great recovery and he got out of the hospital today. His wife rene joins us by phone. Rene, i cant imagine what these last few days have been like for you. First all, tell us how your husbands doing. Hes doing well. Hes okay. I have visual on him. So as long as i have visual on him and i know hes okay, everything is going to be all right. You have visual on him. So what was it like the first time you saw him after everything that had happened . I was just happy i could see him, i could hold him and just let him know that i love him and i am here for him through the whole process, through his whole healing process i am here for him. And words cannot explain i was elated. I was just happy to see him. Did he tell you what it was like when he first realized hed been shot . I guess he was just i guess he was just more than shocked, unbelieving. As well as i was shocked as well. Because i was told to call him. Because i had just got off work. I saw a shooting at fort hood. Its like, okay, i need to call. So i called him. And i did get in touch with him. I said, whats going on . I said, are you okay . He kind of hesitated in a way. And he said, well, i was one of the victims that had been shot. I said when he said that, it just didnt register at that time. Okay he was shot. Everything was just going through my mind. I was like, okay. So after that i heard nothing else from him at that time he said he had gotten shot twice. But i guess after other evaluation they did find out that he was shot three times in the chest and the arm. What kind of i was very it was a very scary situation. It sounds like a terrifying situation. In terms of the recovery, what kind of process are you and your husband looking at right now . Im believing he has to go through physical therapy. And theyve released him from the hospital. I believe he has to go through physical therapy. And he has someone to come in and take care of the wounds. Its going to be not slow but a steady process, healing process for him. So you had to travel from mississippi to fort hood after hearing your husband had been shot three times. Yes. Describe to me then the moment you finally did see him. Wow. It was a wild moment. I was just happy to see him. Because those ours, they felt like days and days. Because i wanted to come right then but i couldnt. So after i actually got here and got settled in and i actually saw my husband, it was like a big relief, a big sigh. Pressure had been taken off. I could breathe again. It was amazing. What was the first thing you said to him . I just hugged him. Thats all i can say. I guess my actions were bigger than words. I hugged him. And i told him that i loved him. It was just amazing. And i was just thankful that god gave him a second chance. All right. Well, renee westbrook, our best to you. Our best to your husband, as we said. You guys are lucky to have each other. And i hope you get to spend some very, very quality time together in the near future. Thank you. Now to the breaking news in the search for any sign of Malaysia Airlines flight 370. It has just resumed in the indian ocean. 13 planes and 11 ships are involved today. Weve first been told the number was higher which would have made this the biggest day in the search. Turns out it was a clerical error on the part of authorities. In any case, the search is still large and now happening underwater as well. Well have the latest from australia in just a moment. First, malaysian officials briefed family members of the people on board flight 370 behind closed doors at a hotel in kuala lumpur. But people who were there say it was a waste of time with no news about what happened to the plane or their loved ones. After the meeting, danica weeks whose husband paul was on the plane asked what many are still asking. How can a commercial airliner simply disappear . She sat down with cnns paula newton and said she needs answers for herself and for her children. Sometimes i catch myself seeing the excitement of him coming home. And i have to get rid of that out of my brain quickly. Because i cant let myself go to that level of excitement. Because it would only its only going to make me crash when i find out the real truth. Which were all expecting will be that the plane has crashed. But until that point, until i have something concrete, i cant grieve. How important is it that they keep looking for him . That they keep this going . Hugely important. Hugely important. As i said, we need something. The families need something. And we need answers, not just for me but for my children. Have you started to think about the possibility that pauls sons will grow up your sons will grow up and not know what happened to him . Ive thought of that possibility, yes. Am i willing to accept it right now . No, im not at that point. Because if this was me on that plane, pauly would be fighting, going everywhere, asking every question, chasing down to find out what happened to me. For our sons and for himself. So i just have to do my utmost right now and keep going to find the truth. And this will all encompass me completely. Again, four weeks now since Malaysia Airlines fleight 370 vanished. For the first time teams are scouring the ocean floor for signs of the black boxes. But without conclusive evidence of any debris its really just a shot in the dark. Kyung lah joins us now from australia with the latest. Kyung, you could hear the determination in danica weeks voice not to give up the search. Because there really does seem to be this creeping sense that search authorities are just guessing where the plane might be right now. Are you getting that feeling there . Reporter well, i think theyre admitting it, absolutely. We heard in the last press Conference Held by the head of the search team that basically theyre not guaranteed to find anything. They dont know if theyre in fact looking in the right spot. They believe they are. They have the best educated guess, the scientists. All the information is pointing to this particular area. Thats why they have those two towed pinger locaters, one from the u. S. , one from the u. K. , doing that 150mile trek. They believe that thats perhaps where theyre going to find that concrete piece of evidence that we heard that wife say she needs. Because the families need it. But yes, theyre not sure that theyre looking in the right spot, john. Kyung, the words we hear now are luck and best guess. It tells you exactly where this search is right now. Kyung lah, thanks so much. The panel joins us next to talk about this. Also tom foreman shows us how this latest search area was arrived at. Well show you the high tech undersea tools that just started working today. And also revisit some of the longestrunning disappearances in aviation history. Stay with us. music defiance is in our bones. Defiance never grows old. Citracal maximum. Calcium citrate plus d. Highly soluble, easily absorbed. Because you cant beat zero heartburn. Woo hoo [ male announcer ] prilosec otc is the number one doctor recommended frequent heartburn medicine for 8 straight years. One pill each morning. 24 hours. Zero heartburn. Add vanishing deductible from nationwide insurance and get 100 off for every year of safe driving. We put members first. Join the nation. Nationwide is on your side breaking news tonight. Searchers have resumed looking for flight 370 including underwater even though in the absence of a debris field it could am to a shot in the indian ocean dark. Possibly but not entirely. The search area may have shifted several times, but at least it only covers a particular patch of water. Tom foreman explains how experts narrowed it all down but also why it might change yet again. Reporter john, if you look at these search areas lately, it can look a bit like chaos. Look how theyve been adding in here for a couple of weeks now, just moving all over the place, sometimes by hundreds of miles. But if you draw a line generally through the middle of all these areas, you might notice something. And that something is this. It matches pretty nicely to that great big track they established a long time ago based on these satellite pings. Now, there are many ways they could be wrong here. Many ways. For example, if you get the trajectory up here off by just a degree or two, you could be way off over here or way off over here. So your search area could be hundreds of miles off course. Another way for example you might have the plane flying into a lower altitude than expected, in which case would get more wind resistance, showing it down and end up much shorter than expected. In addition you might have a different speed calculation. Were in the sure how fast it was going. If it was going 560 miles per hour, that makes it cover a certain amount of ground. If its going 440 miles per hour, thats a different amount. And depending on when the fuel runs out, even a tenminute difference at these kind of speeds can make a gigantic difference when it gets down to the water. But all that aside, they keep coming back to the same area, trying to figure out if its in here. The fact they keep pounding the same general area suggests they have some confidence in this calculation, even if its a long shot. John . Tom foreman, thanks so much. Joining us to talk about this, cnn analyst david gallo, koe leader of the search for air France Flight 447. Former Transportation DepartmentInspector General mary schiavo. Cnn aviation analyst and veteran private pilot miles obrien. Of course cnn aviation correspondent Richard Quest. Miles, i want to start with you here. Ive been listening to every word youve been saying about this. Today you really say its hail mary time. Why . Well, it is. Because the batteries on these pingers, these devices which allow you to try to find them when theyre underwater, will expire the shelf life at least goes off in a couple of days. You have ships onsite. They have the ability to listen for the pings. Even though we have no idea theyre in the right area because we have no wreckage trail, you might as well put those listening devices underwater on the hope against hope that you get lucky and you can hear it. The range in these pingers on a good day is two miles. Theres all kinds of conditions that can make it less. Of course as the batteries go out, that can be reduced tremendously. So it is in fact a hail mary pass but they should do it. In football terms, at least in a Football Game they know where the end zone is when theres a hail mary. Not sure they know where the end zone is here. Richard quest, we hear about the assets now from skies, from space, from the surface and now underwater. Still now that theyve deployed the underwater devices is that reason for more hope . No more hope than there was earlier on, just more assets. Theyve started to add satellite telemetry as well. Earlier it brought up a lot of objects which when they went to find them they could never find them. Therefore it wasnt very valid. Also there havent many satellites actually looking at this part of the ocean normally. So theyre having to retask those satellites. Tom foreman said they keep refining the search based on new math and new calculations. I wonder if people wonder if theyre about new calculations or you have a group of people in kuala lumpur, in malaysia doing the calculations, the socalled international group, the working group, part of the investigation. And amongst that group are the ntsb, faa, the waip, rolls royce, boeing, the malaysians. Inmarsat. Miles would like them to release the documents upon which they are refining the search. Maybe theres a call for that to give more information. Because what they appear to be doing is moving this box around and not really explaining why. So they have to explain why to us. Thats an interesting question. David gallo, i want to bring you in here. As theyre moving these assets around and changing the search area, now they have the towed pinger locater out there. How confident are you that the batteries in the black box are even still working, even still pinging . Thats anyones guess, john. Heres the thing about that. Going over an area and not hearing the pinger doesnt mean that the aircraft is not there. The tpl is useful if you do hear something. If you dont hear something not that useful. I think at this point, knowing where the plane isnt is Important Information, too. And the tpl wont exclude any place. Doesnt really narrow it down very much then necessarily. Mary go ahead. John, i like what i see. For air france 447, something that people thought, a plane people thought would neveren be found. We had a good last known position and we had the debris. The debris was good to say youre in the right area. But the retrofit of the debris led us on a twomonth wild goose chase. We lost time with the debris. It was good back and forth mowing the lawn of the ocean floor that found the aircraft. Im often struck by the differences here. As you said there was debris there within days of that flight disappearing. Here obviously no debris and were a month into it already. Mary, with the batteries either dying soon or perhaps already dead, whats the best Case Scenario here . Is it still floating debris . And they seem to have changed what theyre looking for in terms of debris from possible large objects to something very very small. Well, i think the best chances are for that underwater search. At this point they havent turned up any wreckage. They keep refining the data points. Thats good. We want them to do that. They want to do that. But at this point, i think the pinger is one thing that they will continue to use until the batterys out or maybe its already gone. But then they can do the underwater search, the side scan sonar and other underwater technologies to locate it as they did in air france, realizing however that air france had those system status update messages. It was a wonderful cascade of little messages from the plane telling us they had problems so we knew right where it was. But i do think the underwater assets now hold the best promise. And if the planes largely intact, its fortunately a big target to find. And those resources being deployed now today for the first time. So we will have to wait some time now to see how well theyre working, miles, richard mentioned it before, accusing you of wanting more data. Explain to me what youre after here and how it could be helpful. Youre essentially asking for open source here group think . Yes, i think so. They say the best and brightest minds are analyzing this inmarsat data. But they say Peer Reviewed. It isnt Peer Reviewed in the conventional way that scientists would view it. Its proprietary information headed into an investigation that is considered secret. So we understand why they ha