SAN LEANDRO — A fatal stabbing during an apparent robbery last month has been determined by police and the Alameda County District Attorney’s office to be a justifiable homicide, authorities said Monday.

The Alameda County Sheriff’s Office coroner’s bureau ruled the death of Demario Pillors, 22, as a homicide. No criminal charges will be filed, San Leandro police Lt. Robert McManus said.

Officers responded to reports of a fight about 12:47 a.m. on Dec. 22 in the 1200 block of 143rd Avenue and found two men with stab wounds. Investigators later learned Pillors approached a man in his 30s who was walking home after a shift driving for a ride-hailing company and had parked his car near Heath Park.

Pillors asked the man for a cigarette before producing a 10-inch fixed-blade knife and demanded his wallet and cellphone. When he spoke, Pillors stabbed him.

The stabbed man managed to grab his wallet and throw it in one direction before running away in the other direction, and got about 100 yards away before Pillors caught up to him.

In an ensuing second fight, the man got ahold of the knife and stabbed Pillors several times. Both men were taken to hospitals, where Pillors was pronounced dead. Police said the man has been released from hospital and will make a full recovery.

Police said Pillors, a San Leandro resident, and the man did not know each other before their encounter. Officers recovered a knife and processed the scene with help from Alameda County Sheriff’s Office lab technicians, and obtained video surveillance footage that shows the victim walking in the area and Pillors loitering beforehand.

Contact George Kelly at 408-859-5180.