Soul Vengeance aka Welcome Home Brother Charles was directed by Jamaa Fanaka and stars Marlo Monte as Charles Murray as a proud black man does time in jail where he is subjected to heinous experiments.
Once Murray is released, he immediately goes about extracting vengeance on those who put him in prison. This includes both seducing their women and murdering them by a mysterious means. Then the hook is revealed – his murder weapon is his own genitals which are now enormous and super powered as a result of the experiments he endured in prison:
“Doctor: His penis has grown to frightening limits!”
He now wants revenge!