A former employee at the Puente Hills landfill was convicted Tuesday of killing his supervisor 25 years ago.
John Jesus Alcantara, 52, was found guilty of first-degree murder in the slaying of Robert Bennett, who worked for the Sanitation Districts of Los Angeles County.
Bennett, 52, vanished on Feb. 16, 1983 after a dispute with Alcantara, who at the time was 27.
Authorities believe Alcantara shot his boss, dismembered the body, tossed it into a sanitation truck and dumped it at the landfill. Bennett's body was never found.
Authorities reopened the investigation years later, leading to Alcantara's arrest by Los Angeles County sheriff's investigators in November 2005.
He has remained jailed since then.
Alcantara faces a 25-year-to-life term in state prison, with sentencing set for Monday.