IIRC his dog was chasing pigeons, and the pigeon popcorn person took exception to this.
One thing lead to another, and the pigeon poop promoter shot him dead.
*sigh* That was Buck Naked (Of Buck Naked and the Bare Bottom Boys):
The band came to an abrupt end in 1992 when Buck Naked was murdered while walking his dog in Golden Gate Park’s “Panhandle” by a man named Michael Kagan, said to be an obsessive pigeon feeder. Kagan had threatened to kill anyone who disturbed his beloved pigeons; Buck Naked and his dog provoked him enough to murder.