Most of the gross human beings on this list are just on here for non-criminal offenses. Unfortunately, some reality TV stars just can't stay on the right side of the wall. Baron "Dirty" Colon was one of the many dregs on MTV's From Gs To Gents, where P. Diddy's butler Fonzworth Bentley attempted to transform them from hoods to classy dudes. Colon was a little too far gone, however, and after the show wrapped he was taken in by the cops for the unsolved murder of artist Marcelo Vera. Colon and two other associates shot Vera as he begged for his life and then robbed his house.