the article chad brown wrote talks a lot about that unit which essentially the idea is to have our investigationsnformed by intelligence in our office and to have that intelligence shared with the assistance to our building these cases but we have to get that intelligence we have to make sure it is readable and pushed out to the right folks. we have taken 17 gangs down in that -- in manhattan over the past four years. that means indict and arrest. the results has been very positive which is to say the homicide rate the shooting incident rate, the shooting victim rate in manhattan has decreased more than the other counties. i think it is because we are doing -- we have been doing this very proactive work. that kind of gang typically is somewhat between 13 and 19 years old. >> does the level of crime in a community have anything to do with the da office? >> i think it can. you have to be careful if you are claiming you eliminated crime because of it comes back, you own that too. >> i meant is it really all the police or as of the police and the prosecutors? >> it is 3 -- the police, the prosecutors

chad is working on a special three-day event to happen this summer in ferguson missouri laughter is the best medicine. the goal is to help foster healing and peace after the shooting of michael brownn see with me in the studio. good to see you. >> good to be seen. >> i'm very good. let's talk about what you've got planned in ferguson. you're very busy you've got a lot of going on and attention for your great acting and now giving a pause to focus in on ferguson. what prompted the decision to tackle this the way you've chosen? >> i got a phone call from a friend in atlanta, a pastor actually, and it was around the time where they were going to decide whether the grand jury were going to indict the officer. chad we've got to help these people, we've got to do something. and it just immediately came to mind, these people need to laugh a little bit, you know? we need to ease the tension some. so that was the initial thought. let's do a night of comedy. let's get a-list comedians to come to ferguson and their we are ferguson t-shirts to show we're all one community. to lend their support with their talents and gifts and talents, let's have this whole community lifted up in laughter. >>

chad da joins us from atlanta. do we know what caused these seizures? >> reporter: carol, we really don't. at this point there are a lot of questions about what happened to bobbi kristina brown72 hours have been incredibly difficult for her family. they've been praying for a miracle while really preparing for the worst. now the source that you mentioned also told cnn brown opened and closed her eyes a few times yesterday, but the family was cautioned by doctors not to read too much into that movement. brown was not breathing. she had no heartbeat when paramedics responded to the house saturday morning. nick gordon whom she reportedly married about a year ago, found her unresponsive in a bathtub and called 911. now police say he performed cpr until help arrived. also in the home a man named maxwell byron lomas. we continue to dig on his background but we have found that lomas has a prior drug conviction for possession of marijuana in dawson county georgia, which is not far from atlanta. but, again, police tell us that no drugs were found in the home and at this point they are treating this as a medical incident. as you know the 21-year-old is the only daughter of the late whi