Erupt against police brutality. At least 250 nationwide arrested. In st. Paul, minnesota, protesters launched fireworks, threw rocks and steel bars at police. Smoke bombs were deployed and flash bangs and tear gas. You cant stop the revolution in chicago and new york, hundreds of protesters blocking traffic. 20 people taken into custody in manhattan. Tensions are high in baton rouge, louisiana, following the arrest of 125 people there. More of all of that coming up. First, we are learning gripping new details now about the moments when gunfire ripped through that protest in Downtown Dallas thursday night. This is an exclusive interview. Cnns jake tapper Interviews Police chief david brown and takes us inside the operation to stop the gunman, including his decision to send a bomb robot to finally bring the siege to an end. Chief, an investigator told wfaa that the domestic terrorist who killed these officers was planning a much larger attack than the ambush he carried out on thursday. What can you tell us about this larger plot . It appears that our search of the suspects home in mesquite leads us to believe, based on evidence of bombmaking materials and a journal that the suspect had been practicing explosive detonations and that the materials were such that it was large enough to have devastating effects throughout our city and our north texas area. Were convinced that this suspect had other plans and thought that what he was doing was righteous and believed that he was going to make Law Enforcement and target Law Enforcement, make us pay for what he sees as Law Enforcements efforts to punish people of color. So he had been planning something before the rally and maybe even before the deaths in louisiana and minnesota . We believe so. And we believe that the deaths in minnesota and the deaths in louisiana just sparked his delusion to fasttrack his plans and saw the protest in dallas as an opportunity to begin wreaking havoc on our officers. Is there anything more specific in terms of what he was going to target beyond Police Officers . Thats undetermined at this point, but we are continuing to go through his laptop and his cellphones to figure out what other interactions and who else he might have been interacting with as a result of these plans. We still havent ruled out, jake, whether or not others were complicit. Thats the way we do things. We want to be sure to follow every lead and we dont want to miss any pieces of evidence that might lead to other things that we dont know yet. What else can you tell us that you might have learned from the killers journals . Well, i think that this killer obviously had some delusion. There was quite a bit of rambling in the journal thats hard to decipher. I can just add, at the scene where he was killed he also wrote some lettering in blood on the walls. Which leads us to believe he was wounded on the way up the stairwell on the second floor of the el centro building and where we detonated the device to end the standoff there was more lettering written in his own blood. What did he write . We are trying to decipher that. But he wrote the letters rb. Rb. Yes. Were trying to figure out, through looking at things in his home, what those initials mean. But we havent determined that yet. After the shooting you suggested that the gunman had to have had knowledge of the parade route. You said how would you know to post up there. You also said you have yet to determine whether or not there was some sort of complicity with the planning of this. Have you learned anything more about that . Yes. We had information prior to the rally that the rally would only be a static event at the belo gardens and that after the rally ended people would disperse and go home peacefully. We had no indications that anyone was planning any type of violence to our people or damage to our properties. And there was no route determined before this spontaneous march began, and they just began walking. What we know now is that this suspect was in a vehicle, what is a black tahoe and was leapfrogging the intersections in that vehicle and stopped well ahead of the march. You could easily see the march coming down the street they were walking, and saw an opportunity with some highperched positions, a couple of buildings in the pathway of the marchers and decided to take the high ground and start shooting right away. And the vulnerability of our officers were, because it was such a spontaneous decision to march by the protesters, we had to leapfrog intersections to make sure they didnt get run over by vehicles, by traffic. So because we were not planning to block any streets because of the preplanning meeting information that we received, and we had to scramble to block intersections, which did expose our officers to this attack. And this this suspect took advantage of that, and once he was in a highperched position, officers did not know where the shots was coming from. And we are learning some of the positions of our deceased officers, and it was they were in a funnel. Ended up being a fatal funnel there. Then the suspect continued to move and shoot from different angles from the highperched position down at street level and then back up to the highperched positions at really diagonally, almost triangulating the officers with his rapid fire. It sounds as though his military training allowed him to be quite deadly in this horrific circumstance. We dont normally see this type of moving and shooting from criminal suspects. Were convinced that the military style was a plan and that he had practiced this and, again, i agree with you, jake, the military training he received, you know, did influence how he planned to do it. I am sure he had been deployed to afghanistan, according to his military record, and likely had been trained and taught that type of tactic. There is a report out this morning that the killer said he would only speak with a black Police Negotiator. Is that accurate . That is accurate. Thats not something that we would have liked our Police Officials to divulge at this time until we got further into the information on the suspects laptops to fully understand the reasoning behind that. But since thats out, i have to be honest with you, thats true. For a long time during the negotiation, because of the negotiators expertise, the suspect wouldnt believe he was black. Until they talked some more and but during that talk it didnt matter whether he was black because he was shooting at us. So asking for a black negotiator didnt make sense to us. It didnt matter to us. And it shouldnt make sense to anyone because that didnt lead to any type of peaceful resolution. But that is a request that did happen. But our Police Sources should not reveal that. I want to make sure im clear on that, so the people that leaked that information understand that you are getting in the way of us doing our job by leaking information. So stop it. Three people were arrested in connection with the shooting. But the police have not immediately named them or said why they were being held. Can you tell us anything more about those three individuals . Yes. During the protest that was planned as a static event, several people, 20 or 30 people, showed up with ar15 rifles slung across their shoulders. They were wearing gas masks. They were wearing bulletproof vests and camo fatigues for effect, for whatever reason. Doesnt make sense to us, but thats their right in texas. They marched. But when the shooting started, they began to run. And they began to run at street level across where shooting was occurring. So for our officers, they were suspects. And i support that belief. Someone is shooting at you from a perched position and people are running with ar15s and camo gear, gas masks, bulletproof vests, theyre suspects until we eliminate that. One of the persons turned themselves in because they ran and got away. We put their picture out. We interviewed them and released them because we didnt have evidence that they were part of the attack. One of the other individuals who was running could not legally carry the gun so we charged that person with prohibitive weapon and they were brought to jail. One of the suspects, a female, we released as well. She was running with the two who were armed and officers believed she might have been associated with that but after interviewing her ruled her out as well. From our vantage point, with people carrying guns at protests, wearing bulletproof vests and gas masks, with people shooting at us, theyre suspects until ruled out. All three individuals have been released and you dont believe any of them are involved in any way in these murders . Two were released. One was charged with prohibitive weapon. A misdemeanor in texas when you cannot legally carry a gun. Something unprecedented that happened in dallas, the Police Department used a bomb robot to kill the gunman. Take us through that process. How did you make that decision . I was in radio contact with the s. W. A. T. Team negotiating once we had him pinned down in the second floor of the El Centro College building. And they began conveying to me that this person was in a gunfire with them, gunfight with them. And he was in a position such that they could not see him, he was secreted behind a brick corner. And the only way to either get a sniper shot to end his trying to kill us would be to expose officers to grave danger. The other option was to continue to negotiate. We had negotiated with him for about two hours. And he just basically lied to us, playing games, laughing at us, singing, asking how many did he get and that he wanted to kill some more and that there were bombs there so there was no progress on the negotiation. And i began to feel that it was only at a split second he would charge us and take out many more before we would kill him. So i asked right i was planning a press conference. Before i walked out the door i said i want to plan when i come back from the press conference to end this. I said use your creativeness to come up with a plan to do it. When i got back from the press conference they presented to me what was probably a 15minute plan they put together to improvise our robot with a device to detonate behind the corner within a few feet of where he was that would take him out. And i approved it. And ill do it again if presented with the same circumstances. You just heard the Dallas Police chief saying that the shooter was singing and laughing. Details of the haunting phone call with the gunman when we come back. Blam Bud Light Party here to discuss equal pay. Women dont get paid as much as men and that is wrong. And we have to pay more for the same stuff. What . Yeah. Cars. What . Dry cleaning. What . Shampoo. What . You pay more but get paid less . That is double wrong. Im calling everyone i know and im telling them about this. This has got to stop bud light proudly supports equal pay, thats why bud light costs the same no matter if youre a dude or a lady. Yeah mom you have to pay more for a car than dad. No one treats my mom like this . Welcome back. During a tense standoff, the killer spoke with police, taunting them and even singing at times. The police chief david brown says despite being wounded, the gunman was determined to continue on his deadly rampage. Here again is cnns jake tapper. Tell us more about this phone call. What was he singing, what was he saying . Did he seem at all in control of himself . He seemed it, very much in control and very determined about hurting more officers. I dont recall what he was singing or much about what he was saying. Were trying to get some of our audio transcribed from some of that conversation. But as soon as we do im going to release that because we just believe in transparency as much as possible of all police incidents. I just dont have that here today. But i can just tell you he was clear of mind, determined to hurt more officers, and without our actions he would have hurt more officers. So we had no choice in my mind but to use all tools necessary. And it was about a pound of c4 to end the standoff. I want to ask briefly about the decision to send in the bomb robot, which you said you would make the same decision again. Its prompted a lot of discussion among Law Enforcement officials about whether or not there should be some sort of discussion nationwide about the use of this type of robot. Just to ask a question about this. Could Something Else have been used other than a bomb that would have killed the shooter . Obviously, in a situation like that, Law Enforcement has every right and ability to take out the shooter any way he can. But could, for instance, some sort of riot gas been used instead of something that killed the gunman . I just dont give much quarter to the critics who ask these types of questions from the come efforts and safety away from the incidents. You have to be on the ground and try and determine ive got former s. W. A. T. Experience here in dallas, and you have to trust your people to make the calls necessary to save their lives. Its their lives that are at stake. Not these critics lives who are in the comforts of their homes or offices. So, you know, thats not worth my time to debate at this point. We believe that we saved lives by making this decision. And again, i appreciate critics, but theyre not on the ground and their lives are not being put at risk by debating what tactics to take. Ill leave that to them for a later discussion. Lets talk about your story, your own personal story, because its rather extraordinary. You have lost your partner, former partner of yours, to gun violence, your brother to gun violence. Just weeks after you became the leader of the dallas Police Department in 2010 your son, pardon me, your son fatally shot a Police Officer and another man before being killed in a confrontation with police. How do you think these experiences have shaped the way you have faced the horrific events this week . First of all, i came into Law Enforcement in 1983 as a result of the crack cocaine epidemic in my own neighborhood. I grew up in the poor areas of dallas. I am an inner city kid. I really appreciate my experiences growing up here. This city has embraced me as its police chief. I have always felt a sense of urgency about delivering Police Service. But i never wanted this job to be about me, then or now. I am a servant. And at my core i enjoy serving people. And i am a person of faith. I am a christian. And i believe that service is part of my direction, and loving people despite themselves is something i aspire to be. I am flawed, though, like many of us. But i can tell you right now, you know, im not going to have a long conversation about me on this broadcast or any others. This is going to be about the men and women in blue who sacrifice their lives every day and these families planning four funerals. So i want to spend a lot of time talking about what i have learned about these officers. Theyre courageous. They did things that day that are just hard to describe. Were learning that officers, to expose themselves to draw fire, so they could determine what floor this suspect was on. Exposed themselves. You saw footage of officers running toward gunfire. The extraordinary acts of bravery. Countless officers returning fire, knowing that theyre vulnerable to try to get to wounded and injured citizens and officers, to get them rushed to the hospital to try to save their lives. Just the brave men and women who have worked every day. The day after this incident occurred i look at the daily rolls to see who comes to work. Everyone came to work the next day. Who does that, jake . In the face of their lives being at stake the previous day, you would think that you would have some call in and say, maybe thats not for me. Everyone came to work the next day. I am proud to be associated with these people. I stay humble. So im not going to talk much about me. I think you said much about my story, and i think it speaks for itself. And i hope that i have done a good enough job to represent these brave men and women. Thats been the challenge for me. Am i representing them appropriately . So i am really, really, really not wanting to any of this to be about me, jake. I hope you can appreciate that. I can, sir. What can you tell us about the officers who were wounded . Many of the officers have been released already. One of the d. A. R. T. Officers was still in treatment at the hospital on yesterday. I believe hell be released today if not last night. Theyre recovering, not only those officers but looking in the faces of all of my officers, when i see them coming in and out of headquarters and out on the street, theyre theyre in shock, jake. You know, one thing other thing that i have learned about this is that the conversation about policing in this country, this is not sustainable to keep these officers encouraged. These officers risk their lives for 40,000 a year. 40,000 a year. And this is not sustainable, not to support these people. Were not perfect. Theres cops that dont need to be cops. I have been the first to say, we need to separate employment with those types of cops. 1 or 2 . The 98 , 99 of cops come to work, do this job, come to work for 40 grand. Risk their lives, not knowing whether they are going to come home, they get this criticism. Its just not right and its not sustainable. I am making a plea to this country to stand up as a silent majority and show your support for these people to keep them encouraged to protect you. And i am saying this from the heart. I hope im not lecturing too much. But this is really important, from my perspective, that we show these folks that we applaud the heroism and that we let them know without a question that we support you in your efforts to protect us. Who specifically do you think needs to show more support to our men and women in blue . Is this something that youre directing to public officials, to any specific protesters, to the media . Who do you wish were more supportive . You took the words right out of my mouth. Media, public officials, and our communities. How media tells the story. How you sensationalize the video, how you edit the video. Show the whole story. And when you dont know the whole story, say there is more to be determined instead of jumping quickly to conclusions without a full investigation. We need more people in the community to come forward. There is a silent majority out there that doesnt realize that a minority voice is loud, critical of Law Enforcement, without all the facts. And our public officials, local and national, need to step up. I am encouraged by what i have heard, but we all need to make