Oakland police say they are investigating the slaying of a disabled man over a bag of empty cans.
A stroke suffered by Sylvester Green in 2000 left him barely able to speak.
Police say that's why the 57-year-old Oakland resident was unable to explain to another man why he couldn't sell his cans at the recycling center.
Green was beaten and fatally stabbed Friday.
Homicide detectives say the remorseful suspect in the killing believed Green had pocketed the money.
They say Green didn't have the necessary I-D to sell the cans.