But today its also important, very important to remember and honor the victims. Including the slain officer who got married just about two weeks ago. Truly a sad day for our nation, the latest chapter in an absolutely horrifying series of events. This week like so many times in recent history the nation watching videos of black men being shot by police on back to back days. A woman claiming to be johnsons aunt telling nbc news none of this should have happened. She responded, quote, i think you know the answer. Its due to how america is face ed with blood being spilled. I think a person can only take so much. Last night started as a peaceful demonstration as a reaction cooperating together. Then it turned to shear chaos. Assist, shots fired. Code 3. Stay off the radio, officer down. All s. W. A. T. Officers on channel 2. Code 3. Market lamar, shots fired. We have got to get them out of here now. Right now. Get them here. We believe hes in el centro building. I think they have up on the first floor he has three people. I dont know if they are friendly or not. Weve got s. W. A. T. Outside. Weve got an open window on the side of lamar. Weve got rifles hanging out. Again, that was the scene not long ago a block behind me here in downtown dallas. Roughly 20 square blocks, 20 blocks here in the downtown part of the city still shut down as the Investigation Continues at this hour. Lets go over to Baylor University hospital now. What more can you tell us about the victims and their conditions at this hour . Many of the victims were brought here because this is the Level One Trauma Center that treats most of the gunshot wounds. We have some video from last night. There was a moving tribute. Police officers and hospital staff lined up outside of the e, as two of the slain officers were brought out. We know who three of those who passed away. One of them did three tours of duty in iraq. Michael krol was a former sheriffs deputy in wayne county michigan. And Brent Thompson with d. A. R. T. He was married just two weeks ago. We also have the names of the three d. A. R. T. Officers that were injured. Omar cannon, misty mcbride, and jesus retana. One of those officers has been released. The other two are still being treated here but are expected to be okay. Craig . Jesus is the officer released. Tammy leitner, thank you. Well come back to you in just a bit. Lets turn now to the highest ranking Law Enforcement officer in dallas county. Dallas county sheriff, i know youre very busy today. Thank you so much for making some time for us. Statistics about arrests and Excessive Force complaints show that the relationship in this county has dramatically improved over the past five or six years. Why did Something Like this happen in dallas . I think its just a lone person thats doing Something Like this. Of course, theres passion and theres a lot of angry feelings. We understand that. I think thats why here in dallas we work so well. The Police Officers do understand that and we do try to work with the community. If you notice today during the prayer and any other time when the community was there, the Police Officers were there. So were not really sure why and this is the primary investigation of Dallas Police. Were just in a support function. They have most of the ball in this investigation. Sheriff, can you shed any light on one of the outstanding questions here, the suspects. We had been told there were a number of people that had been three people that had been taken into custody. They were being questioned. They were called suspects. We havent heard anymore about those suspects. What can you tell us about that part of the investigation . Unfortunately, i cant tell you very much. As respectful of who is carrying the investigation, well let them do all the discussion. If they are not bringing it out, theres a reason for that. So well allow them to take the lead. Just like we expect others to respect what were doing. There have been a number of folks who have been somewhat critical. Theres a congressman here in texas that suggested that perhaps the Police Department and some of the other agencies involved may not have been as prepared as they should have been because they were so close to the protest. Some of the officers even marching with the protesters. Whats your response to that that the officers may not have been prepared for this ambush . I think whoever suggested that does not know whats going on down here. How more prepared can you be than be right there with the protesters and walking side by side with them . In a situation, in a crisis nobody knows exactly what is going to happen. But if you notice there was Quick Reaction and Dallas Police along with other agencies went immediately to take care of the perimeter, safeguard the people, try to get their folks to the hospital as soon as possible. I dont think we can be criticized at this moment. I think at this moment the departments here are hurting. And i have said several times today at some point im going to cry, but not right now because were too busy. We need to take care of the things that are before us. I honestly believe that Dallas Police and everybody else around them reacted in the best possible way that could have happened at that time. Sheriff, how are your officers doing today . Were busy. As long as youre busy, you dont have to deal with whatever is hurting in the head or the heart. But at some point, well deal with it. But right now we need to take care of the things that are around us. Its not just Dallas Police and us. From the federal to the local School District is there right in the middle helping everybody. Sheriff, highest ranking Law Enforcement officer here in dallas county. Thank you so much. Our thoughts and our prayers are we you and your officers and deputies. And the thoughts and prayers of this kocountry as well. Thank you. We have been talking to a number of folks this morning who were a part ofhe protests last night who had to run and duck for cover. Henderson was one of those folks who got caught in the cross fire. Lets start from the beginning. You were a part of the protest. Part of the rally. When did you realize that things had gone awry . After the rally, everything was pretty peaceful. I didnt go to the march, but i ended up going across the street to meet someone. So it was literally like 8 45, 9 00. I ended up leaving because i was going to catch a train home. Thats when you hear the shots. Did it seem like the shots could you tell where they were coming from at that point . No, i couldnt tell. People were running and ducking and hiding behind walls. That was the scary part. Where did you go . I was at a building that went right behind a wall. How long did you stay there . I stayed there for about 20 minutes. But then when we came out, somebody said duck again. So i wept right back and stayed there for 20 more minutes. There were no more shots at that time. But you heard shots . Yes, sir. Were you by yourself . No, i came down with some of my friends. I was walking by myself, but my friends were at the rally. But during the shot, i was with nobody. This was a cowardly attack on Police Officers in your city. Did you have any interaction with those officers during the attack after the attack . No, sir. I didnt talk to any officers. How would you characterize the relationship between people and the police in dallas, texas. Obviously, you have cases like Police Brutality. I do believe that people that have been on the edge. A lot of people of color, men, women and children. Its a lack of accountability when things do happen. So you do have that tension right there where you have a lot of people in the community who do not trust those police. When it comes to rallies and protests, things are pretty peaceful. On an average day, there are some people who are really hesitant. My understanding is that today was your first day of teach iing creative writing at juvenile justice center. Is that right . Yes, sir. I would imagine it took on different mean iing today. Yes, sir, but a lot of the students knew about it. So we talked about that as well as things they were going through. What did they say to you . It was a cowardly attack. They didnt have many details. A lot of them did try to connect that to different rally. I was like, no, these are two separate things. But you know a lot of people are doing that today. They are connecting that rally and the causes that were being advanced at that rally to what happened to the Police Officers. Right, and people say obviously i dont know that for sure. The rally was peaceful. I believe thats a separate thing. Who began shooting, those are two completely separate things. The rally was peaceful. The police were cooperating with the people. Spraut things. So i see how somebody was trying to draw the line. I did talk to a guest earlier who was also in the melee last night. Did you hear anything like that . Later on, but not during the shots. While we were in the middle of the streets once things calmed down, you had people because it was one man who was arrested who had a gas mask on. He had his hands up. You did hear people saying things to the police. Let him know why are yall messing with him. Hes not doing anything. So thats all i heard in regards to that. Glad youre okay. Appreciate your time. Well have much more coming up from here in dallas, texas and within the hour. My colleague lester holt will join us with a democratic partys presumptive nominee Hillary Clinton. At the beginning of the 21st century, the earth needed to find a new way to keep up with the data from over 30 billion connected devices. Just 30 billion . 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Its new and improved with guaranteed tidylock protection that locks away odors. So you dont have to face one more stank face. Tidy cats. Every home, every cat. Theres a tidy cats for that. Craig melvin back live here in dallas, texas, where the Investigation Continues behind me. Perhaps you can still see the Yellow Police tape. Were told that investigators are still Walking Around in addition to talking to people also picking up fragments as well. Im going to step out for a second. I want to show a development here. This large police bus is the mobile command center that we saw pull in maybe about 20 or 30 minutes or so ago. But that is something that was not there this time last hour. I want to bring in Dominique Alexander now. Founder of next generation action network. This is the group that organized last nights protest here in dallas. There had been some questions about precisely who it was that organized the protest. Was it just your group alone. It was our organization. We collaborated with other activists in the community. But our organization took on the obligation to organize this protest within 24 hours. What was the purpose of the protest . The purpose was a protest to come together to talk about the National Argument of whats going on with Police Brutality in america. It was to respond to alton sterling and within hours later of us announcing it was to respond to minnesota shooting. An officer has not been indicted for over 40 years in the city of dallas. So it was to talk about that we have our Alton Sterlings here in dallas. Enough is enough. We need some concrete change when it comes to Police Brutality. The man that police say reeked the havoc here and killed those officers. Did you know him . Did you know of him . I never met him. Never saw him. And we as an organization and as a community to addressing Police Brutality we say no to violence in any capacity. We do not condone violence. We know that violence will not bring the change that is needed in america. Were asking people to stand together to bring the change that is necessarily needed. We are praying for the family of the officers that lost their lives. Were standing with them right now. We know officers were part of the rally last night. A number of them were even marching with you guys. We heard people were shouting things at the police. Using language that e we cant use here on cable television. Is that true . Where i was, i didnt hear it. I was one of the ones that spoke at the courthouse when e we got there and when this came out. I didnt hear it in the front of the march where the advanced officers that were shot were at the time. So i didnt hear anything of that nature, but i know if you lock at the dallas Police Departments twitter and look at our twitter account, youll see this protest were going in a good manner and this was almost at its end. It was just one block from dispersing. So we accomplished what we were accomplishing. We were ready for our Community Meeting that we were going to have on thursday. We made positive strides out here. All chaos broke loose. So everything was going at its course. Every movement and different things, people have their different ways of fighting the movement. I wont say people were out there saying anything, but the true purpose of the organizers that came out there that day, that wasnt our sentiment. Our sentiment is we were tired of officers gunning us down in the communities across the country. And enough is enough. In the city of dallas, we know we have the simple fact that an officer has not been indicted for over 40 years. We have our jason harrisons. We have many cases we have them here in the city of dallas. Do you feel in any way, shape or form partly responsible for what happened here last night . No one can be responsible for this issue because we were ending. We were ending the protest. You cant point the blame at anyone. I was standing right beside an officer. No one knew what was going on. Theres two issues in america. Theres an issue with Police Brutality and an issue with guns. And the elected officials that we elect in these offices or however, you feel, whatever party you align with need to address that issue so these type of actions where we are reacting, we need to be proactive and actually have the political process, do something for the people so the people can be safe when they exercise their constitutional right. Thats a good spot to leave it. Thank you. Thank you very much. We will have much, much more from here in dallas, texas. Well also have that interview. Lester holt will be talking to the Presumptive Democratic nominee Hillary Clinton in just a short time. This is msnbc, well be right back. And then you totaled him. You two had been through everything together. Two boyfriends, three jobs. Youre like nothing can replace brad. 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I was also on twitter and facebook watching a number of these videos as well. More videos have surfaced today, i understand. Yeah, you could have watched this in realtime. You did and a lot of people at home did. It was coming through Facebook Live and some of these othe