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Autopsy report reveals new details in alleged murder by off-duty sheriff's deputy

Erika Aguilar/KPCC

A small memorial marks the ground outside the family's home where 38-year old Armando Casillas died from one gunshot wound to the chest after a dispute with a neighbor on June. 17.

An autopsy report reveals more details about the death last June of a man in Sylmar allegedly shot by an off-duty Los Angeles County Sheriff's deputy, including the possibility that a second person was involved.

LAPD detectives believe Francisco Gamez shot Armando Casillas, 38, after Casillas argued with Gamez's son. The new documents describe Casillas standing on the sidewalk outside his parents' Sylmar home shortly after the altercation. A car drove by and a man (Gamez, say police) shot at Casillas out the front passenger window, hitting him once in the chest. The shooter fired again, hitting a nearby car before speeding away.

It's unclear how many people were in the shooter's car. Detective Lou Zorilla, the investigator on the case, says police "are open to the possibility" that someone other than Gamez was driving. Gamez was arrested and charged with murder last month.