“the victims are most often African American men.”
Let’s see the statistics.
Hoaxers adopt the "dog bites man" approach. We are more willing to accept something that conforms to our experience than something that contradicts it. A black man is more than 100 times as likely to kill white woman as vice versa. Blacks commit most murders, so they make more plausible patsies, as a group.
I would guess that for every black man wrongfully convicted, a dozen get away even though they’re guilty.