chillings in south carolina earlier this summer. why did i do it? i put down a deposit for a gun on 6/19/15. the church shooting in charleston happened on 6/17/15. later he writes admiration for the mass killer at virginia tech and the columbine high school killers. his final tweet, i filmed the shooting, see facebook. drew griffin, cnn, washington. cnn law enforcement analyst cedric alexander joins me in the studio. these are tragic circumstances that we speak of this situation where we see a gunman kill two journalists live on television, film it, and post it on social media. have you ever heard of such a thing and talk about the type of individual who would do such a thing. certainly i have not ever seen this before. this is very new and different