[Whitfield:] We're also following new developments into the investigation into the mass shooting in Virginia Beach that killed 11 city employees and a contractor. Officials now say the gunman resigned just hours before he opened fire on his coworkers. The longtime city employee sent his supervisors an e-mail early in the day saying he was leaving his job. The city also confirming that one of the victims was a supervisor in the gunman's chain of command. Today police also release dramatic new details about the shooting. For more on these unfolding developments, let's bring in CNN's Miguel Marquez. So, Miguel, what more are we learning about the suspect, the possible motives and what's happening there now?
[Miguel Marquez, Cnn National Correspondent:] What may be absolutely disturbing about this, Fredricka, is that this is a person who everyone CNN has talked to, everyone that I've seen in other reports has said, he was a friendly guy, he was a quiet guy, he was an OK guy and then this. You talked about the resignation earlier in the day. His immediate supervisor was one of the people that was killed. It is not clear if he targeted that individual. Police have spoken about how all of this played out. I do want to show you exactly where we are right now. This is the police station on the other side basically of where all of this took place. This is the official memorial here that is being set up. Police pointing out that their officers moved from this area towards that building up into it and engaged him. The chief of police giving us a few more details about how that long gun battle took place.
[James Cervera, Police Chief, Virginia Beach:] Five to eight minutes after these officers began to enter the building and made contact and engaged with the suspect on the second floor of the building. I can't tell you how many minutes shots were being fired. I can tell that you in the police world, anything more than three to five shots is a long gun battle. As the suspect was firing he was moving. They were returning fire and at one point, the suspect was firing through the door and through the wall at the officers, and then the firing stopped. They eventually breached the door, and when they breached the door the suspect was then alive and was taken into custody and first aid was immediately rendered to him.
[Marquez:] And it cannot be emphasized enough that these police officers who rushed in there, one of them had the presence of mind to slap on a protected vest that saved his life because he was ended up shot by the suspect. And now, this, people coming here to hold hands, lay flowers, say prayers, get on one knee and hope and pray that the people who are affected by this will start to feel some sense of relief and to know that others are with them. Just absolutely shaking this community, like so many communities across the country. Virginia Beach, Virginia, now part of on a very grim list of cities across the United States that has suffered this sort of mass shooting. Fredricka?
[Whitfield:] All right. So tragic and so senseless, all right. Miguel Marquez, thank you. I want to bring back now Charles Ramsey, former Police Chief, Washington, D.C. and beyond, all right. So, chief, you know, city officials are saying they are still searching for a motive, you know, in the Virginia Beach shooting. They did admit that he sent a letter of resignation just hours before going on this deadly rampage. But do you feel like they, you know, they know more than they are letting on or is this an incredible mystery to all those involved?
[Ramsey:] Well, they might know a bit more than they are letting on, but it's also very possible that they are still struggling trying to find a clue as to what made this guy decide to do what he did. I mean, he submitted a letter of resignation or e-mail of resignation just prior to beginning this rampage. I mean, he's 40 years old. He's got 15 years I believe working there. Not old enough to retire or anything. Something must have happened to make him suddenly resign. It doesn't necessarily have to be just at the workplace, maybe in his personal life. I mean, who knows? They've got to continue to go back, they'll sort through everything that they can possibly sort through to find try to find a motive, that quite frankly they'll never know.
[Whitfield:] What are those things you believe that they are sorting through? I mean, we know the obvious in terms of the crime scene, going to their place of residence. But, you know, what's the spans in which they look?
[Ramsey:] Well, social media, friend, relatives, anything that might give them a clue as to what it was that was going on. I mean, you know, this is an unusual case, to say the least, simply because it doesn't seem to be any real indicators that we know of, at least as of now. Of course, we're always looking at red flags and hindsight is always 2020, so I don't know if any of his behavior would have been at a level where there should have been intervention by police or anyone else quite frankly that we won't know until more information is uncovered.
[Whitfield:] Yes. What do you assess about the planning? I mean, you know, clearly he had quite the arsenal, officials did reveal that, and the use of the silencer, then canvassing at least three floors of that workplace.
[Ramsey:] Well, he had it planned, there's no question in my mind just from his actions. I mean, he had two semiautomatics with magazines. He had a suppressor. He covered all three floors of that building which in itself is a bit unusual. But, you know, he knew the place. I mean, he work there forever, and we don't know if he was trying to hunt down certain people, was he just doing it randomly to kind of maximize the number of casualties? But that's not something that was spurred a moment, guaranteed.
[Whitfield:] Chief Charles Ramsey, thanks for your expertise, really appreciate it.
[Ramsey:] It's quite all right.
[Whitfield:] Coming up, the Trump administration threatens tough new tariffs on Mexico over the migrant situation at the border. The President's plans to stop what he calls an invasion, next.