they just reported on it on CNN, man this is some real fucked up shit, they said that he was working with another group when it happened, and that it had to be someone that someone in the studio knew cuz they had to buzz the person up to get in the labb, and that whoever did it knew exactly what they were doing and who they were shooting at, they said he moved one person out of the way to get a clear shot at Jam Master Jay and fired at least 2 shots hitting him in the head execution style, one other person was injured they think maybe by a ricocheting bullet.
that is hella scanless, he must have pissed someone off really bad for them to kill a legendary DJ / Producer like that