Most of them have been killed by black gang-bangers.
Based on the Martin case, and how this has been portrayed by the liberals, the media, and the race baiters, you would swear that the biggest threat to young black men was a White Hispanic neighborhood watch volunteer.
In fact, by far, the biggest threat to young black men are other black men with guns. But, why let the facts get in the way of the liberal narrative which has been constructed?