The pickup had tinted windows and the black guys didn't know who was inside. Later they claimed he had called them the N-word but Michael's wife said that he never spoke to them.
It got some national attention at the time--Tony Horwitz had a snarky piece in the New Yorker about the incident (his attitude seemed to be that the white people of Todd Co. were just a bunch of racist losers and that Michael's death was no loss to society)---later expanded into a book called Confederates in the Attic.
That’s a sad situation. Thanks for the info.