AIUI, Huey was murdered by someone in a crack gang. The CIA was fuelling the crack epidemic. I don't know how much tin foil it involves, but it seems plausible that the CIA used black on black crime to make sure no one cared about the murder.

> His existence prevented another movement like the black panther to take place.

I hadn't heard this, but I'm really not educated on the topic so that's not surprising.