Same thought occurred to me....Perhaps he played a little too well and the numbers weren't there. Williams left the came in the second half with an shoulder injury but shows up in a club for party time.
Gamblers wouldn't use a method this crude though. They are more into bombs and one in the head...
This smells like gang activity. Williams had some gang back ground and was talking about going back to his home to work with local youths about staying out of gangs.