Reporter as we said, three Police Officers were killed in the ambush. Three remain hospitalized, including a sheriffs deputy, who is in very Critical Condition at this hour. Among his injuries, is a gunshot wound to the head. I spoke with louisiana governor, john bell edwards, just a short time ago. Were asking people around the country to join their prayers to ours for these officers who were injured. One of whom is fighting for his life in the baton rouge hospital now. But also for the family members of those who were injured and killed. And for our community and our nation as a whole. We simply have to do better, chris. Were going to find a way to do that. Reporter our nbc reporters are following all the developments in this very active investigation. We begin with gabe gutierrez, who is here with me at the crime scene. Whats the very latest were learning as police who have got federal, state and local police all working on this investigation. Thats right, chris. Theyre all going through Surveillance Video from this area, as well as the gunmans history. This is where police say it happened. Where that gunman was there with the rifle, as someone called 911 and reported him in black fatigues. When officers responded, the gunman opened fire. Now as the city mourns its fallen officers, investigators are poring through the gunmans twisted digital history. Shots fired. Officer down shots fired officer down got a city officer down. Shots fired. Reporter this morning, baton rouge is grieving as we learn the identities of the officers killed in that deadly encounter. Brad ga remove low with the Sheriffs Office for 24 years. Matthew gerald, a rookie, with Baton Rouge Police. And monday montrel jackson. Jackson posted on facebook about his feelings of being a Police Officer in baton rouge, writing, i swear to god, i love this city. But i wonder if this city loves me n. Uniform, i get nasty, hateful looks. And out of uniform, some consider me a threat. Ive experienced so much in my short life, and these last three days have tested me to the core. He said, if anyone out there sees me and you need a hug and a prayer, come talk to me. Reporter the chaos erupted just before 9 00 a. M. Sunday after Police Received reports of a man dressed in all black, wearing a mask and holding an ar15 type assault rifle. At a gas station, less than a mile from Baton Rouge Police headquarters. When officers arrived, the gunman opened fire. Shots fired, shots fired. Reporter this morning, police say the gunman did not lure police with the phone call, but instead carried out the ambush after a member of the public called 911. We think the suspect is down. Reporter Authorities Say the lone gunman is gavin long, shot dead at the scene of his 29th birthday. On july 8th, long posted a message about warriors on his youtube page, though its unclear if its related to the shootings this weekend. The man knew, he couldnt go home. Either he killed his enemy or he died. Reporter was this an ambush . We clearly believe the individual that targeted these peace officers was specifically targeted peace officers. Followed by the Fatal Shooting of Philando Castile in minnesota and the murder of five Police Officers in dallas. President obama condemning this latest violence. Nothing justifies violence against Law Enforcement. Attacks on police are an attack on all of us. Reporter Alton Sterlings aunt, making an impassioned plea for peace. We dont want any more bloodshed. Stop this killing stop this killing stop this killing reporter so much emotion here. In fact, i was speaking to the governor this morning. He said he hopes the president will come, because this is clearly a community on edge. Certainly. This really is a community on edge. Even last week, chris, authorities here said there was a plot, that they made several arrests regarding stolen guns, regarding a plot. They said an alert to kill Police Officers. They now say that this latest shooting is not related to that at all. This is clearly a community that is on edge. That is now mourning the loss of its Police Officers. And chris, you know, authorities are now saying that the 911 caller did not lure that this gunman acted alone. That the report from the 911 caller is not meant to lure the Police Officers here. Again, authorities now say this gunman acted alone. Investigators trying to piece together the motive. Reporter thank you so much for that. As we mentioned, just a few minutes ago, police have discovered another piece of this puzzle. I spoke with the Police Superintendent just a few hours ago. We know that he was here for two days. Were trying to put together the pieces. Were looking for all individuals he talked to. Were going to interview those individuals. We have talked to some. Its important to put the puzzle together of what brought him to that location. Why did he specifically target Police Officers, ambush the town. Reporter with more on the gunman, lets bring in justice correspondent, pete williams. Pete, from your sources, what are the key things we know and what do we still dont know that would help them really figure out how this all happened . Well, a definitive evidence of why he did this, and why he went to baton rouge. But there seems to be a pretty long trail that he left on social media of his sort of evolving views about. This he had training with weapons, he served five years in the marine corps as a computer specialist, deployed to iraq for six months in 2008. He got out in 2010, and then became interested in a kind of selfhelp interest. He called himself cosmos. He described himself as a freedom strategist, mental game coach and nutritionist. And then in a series of online videos and twitter postings, he called himself he called his website convos with cosmos. Conversations with cosmos. And if you trace them out, he says that he was in dallas shortly after the violence there, that he began to say that the attack on police in dallas after the shooting there was justified. He said in a twitter message just last week, vifls is not the answer, its a answer, but at what point do you stabbed up so your people dont become the native americans extinction. And then in an online video, protest isnt enough. That people have to fight back. So he was in dallas, and then as you learned from the police, makes his way to baton rouge. Now, he said in his online videos that he was selling a couple of books he had written, this sort of selfhelp philosophy that he had. But its also known that he was associated with a movement called sovereign citizens, people who dont believe in the authority of the government. They believe that police are ill legitimate. How this all fits into this mixed up philosophy, i think is something theyre going to have to straighten out. In terms of the weapon that gabe talked about, federal officials tell us that he bought it a year ago in missouri. He was living on and off with his mother there, when he wasnt on the road selling his book. And theres no reason to believe that the gun wasnt sold legally. There was nothing in his background that would have disqualified him from buying a gun. He had no criminal record and he was honorably discharged from the military, chris. Yeah, actually got some medals there. Pete williams, thank you for that update. Now the latest on those three Police Officers who are still hospitalized at this hour. Nbcs Kerry Sanders joins us from Lake Regional Medical Center here in baton rouge. And kerry, the way a Sheriff Department official put it to me this morning, there is one of the officers hovering between life and death. Literally fighting for his life this morning. What can you tell us . Absolutely. Our lady of the lake hospital is also a house of worship right now, as people are gathered around praying for the recovery of that officer. He was wounded multiple times, including a gunshot to the head. Hes identified as 41yearold nicholas actuallyier, currently in Critical Condition. He has 18 Years Service in the uniform division. So thats important, because that means hes wearing a uniform. Thats why he was targeted when he responded. Also here at the hospital is bruce simmons, 51 years old. Hes also with the uniform division, and he has nonlife threatening injuries. He is being cared for here. Family and friends have gathered around here, but also this hospital is associated and established by the franciscan order of the national church. The nuns established this hospital here and the Bishop Robert munch arrived here yesterday, praying for the recovery of these officers. And as you noted, there is one other officer who was injured. He was taken to baton rouge medical, and he is from what we understand, been treated and released now. Chris . Kerry sanders at the hospital for us, i know youll keep us updated. Now back to jose in cleveland. Chris, thank you so much. Security concerns high here in cleveland. Dozens of groups planning to demonstrate for and against presumptive nominee, donald trump, over the next four days. Coming up, the bold and the beautiful. Donald trump promises convention would be starstudded, spectacular. Where are they . Which big names did the Trump Campaign land . Well tell you who is and not set to speak on the rnc stage. That and more live from cleveland, ohio, when we come back. Take on any road with intuitive allwheel drive. The nissan rogue, murano and pathfinder. Now get 0 apr for 72 months, plus 500 bonus cash. Parts a and b and want more coverage, guess what . You could apply for a Medicare SupplementInsurance Plan whenever you want. No enrollment window. No waiting to apply. 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Make sure your doctor hears you too i hear you because i was there when my dad suffered with diabetic nerve pain. If you have diabetes and burning, shooting pain in your feet or hands, dont suffer in silence step on up and ask your doctor about diabetic nerve pain. Tell em cedric sent you. Security is already high here in cleveland. But with the recent Police Attacks in dallas and baton rouge, authorities are on extra high alert. Take a look at some of the numbers behind rnc security here in cleveland. A 50 million federal security grant was given to the city of cleveland for hosting the rnc. Its estimated about 50,000 people expected to attend. 5,500 officers assigned to security. That includes a mix of federal, nonfederal and cleveland Police Officers. 58 groups granted permits that allow them to protest, parade or march during the convention. Nbcs jacob rascon also here in cleveland and has much more on security measures being taken. Jacob, good morning. Reporter good morning. Cleveland won the bid to have this convention a couple years ago. They have been preparing for a long time now. This is the speakers platform. You mentioned the 58 groups. A lot of them will have time throughout the day today and tomorrow and next day to speak. And then, of course, we expect many more people to be gathering here. There are hundreds of officers just in this area seen and unseen. I want to bring in, because we have one of those groups, and they range from one person all the way to 5,000 people. And here we have a few people. This is colleen. Colleen, the message that youre bringing is on the sign, of course. Why did you think it important to come during the convention for your protest or your demonstration. The Republican Party has historically been terrible on row reproductive rights. And its really important to bring attention to that. Reporter and how do you think it went . You already went up there. Anita, actually, went up to speak on behalf of n. O. W. And it went really well. Reporter thank you very much for your time. Youre going to see a lot of voices, a lot of viewpoints, a lot of specifically protests, a lot of anti trump. And here is somebody who has, as he says, up to a half hour to speak. And hes alone. Youre going to see a lot of that. Most of the 58 groups are just that. But jose, they are prepared with 5,500 officers, an overwhelming police presence, in case when the big crowds come, anything happens. Jose . Jacob rascon, thank you very much. Clevelands chief of police, Calvin Williams, starting to speak right now. Lets go to that. Yesterday afternoon, it started at east 36th and euclid and ended right out here at east 9th and lakeside. Peaceful. Not too many issues. You probably saw our bike patrol officers out, escorting that march down along with some other uniformed officers. But that was about it for yesterday. Again, that ended peacefully. No real issues. Of course, the back and forth with the demonstrators expressing their First Amendment rights. That was about it. We also did have one minor arrest yesterday. A male was arrested for petty theft. A local male. I guess he had an issue with the equipment that one of our state troopers was carrying, specifically his gas mask pouch on his leg. And attempted to remove that pouch from the troopers leg, and he was arrested for petty theft. We think that arrested male may have some mental issues. Thats it. I think we have two marches scheduled for today. Im not quite sure. Ill look at that schedule. And then the speakers platform started today also. On public square. Thats it. I have a question for the mayor. You mentioned [ inaudible ] [ inaudible question ] well, the chief can tell you, the latter part. But yesterday there was a small demonstration with open carry. I think two or three people only. And the police dealt with them. And in terms of whether theyre loaded or not, i dont know. Are they and the answer is yes. Ahead of the convention, local media was told there would be plenty of Police Officers patrolling the neighborhoods. But this past weekend turned out to be one of the deadliest of the year. Upwards of 20 people shot. Im curious to know, were there more officers working in the neighborhoods over this past weekend . Yes, there were. But as i stated to another outlet a few days ago, you know, urban issues and urban crime has cycles. Sometimes well get a weekend with nothing at all happening. And sometimes well get a weekend as violent as this past weekend. But we did have plenty of officers out. As a matter of fact, one of the shootings we had near east 55th and euclid, we actually had a car on 55th. The shooting happened a block over on prospect. And the officers were actually right there in that area. Actually heard the shots and called it out themselves. And responded with other cars to that shooting. Chief, could you clarify i know you were asked a couple days ago. But the open carry one is legal for open carry, and then at what point is the person violating the law and officers could respond . Well, the person violates the open carry ordinance when they actually brandish that weapon or threaten someone with that weapon. The ordinance requires a person to safely handle a weapon, so you cant point it at people, you cant threaten people with it in any type of gesturing or manner im mannerisms. We make sure that people under open carry understand those rules, understand that part of the state law. And if they violent violate that, theyre subject to sanctions. And one more question on the heels of the tragedy. There are a number of departments around the country that have beefed up, doing twoman cars, et cetera. Do you change the way youre staffing based on that . Our officers have been in twoman cars since right after dallas. The tragedy in dallas. Can you define for us open carry and conceal and carry . [ phone ringing ] ill wait until thank you. Open carry is like the way im dressed today. Your weapon out, so it is visible. Conceal carry is the weapon is not visible. For conceal carry, you need a permit in this state. There is a class you have to go through. There is a shooting class, a written class. And you have to be certified by the county sheriff to get a concealed carry permit in the state of ohio. Yes, sir. Other than twoman cars. [ inaudible ] not for the convention. For the officers out in the neighborhoods, again, just like the tragedy in dallas, officers are more keen to things that are happening, and our officers are told to be especially cautious during their tours. Yeah, we also about a week before the convention kicked off, we initiated a tip line that the fbi is manning for us. And thats 18002255324. If you see something, Say Something tip line. So we encourage people, 18002255324. We encourage people to make sure that they use that tip line, if they see something suspicious out there, in the neighborhoods or downtown here with the convention. Has the level of threats or possible threats more than you expected or less t