Via Jalopnik (via Consumerist):

The Marathon station on Fort near Springwells dropped its price to $2.93. That angered Jawad Bazzi, whose regular gas was priced at $2.96.

Bazzi walked across the street with a couple of employees to confront the Marathon owner and his posse.

The groups argued, then began throwing punches. One of Bazzi’s employees hit a Marathon employee with a baseball bat, injuring him.

That’s when the Marathon owner grabbed a handgun and fired three or four times. Bazzi, 45, of Dearborn Heights was shot in the head.

There’s an update to the story here.