Oscar David Barrios Mazariegos, 29, was shot to death in the early morning hours of January 22, 2026, in Anderson, South Carolina. The victim, a self-employed mechanic originally from Guatemala, was found in his vehicle outside an apartment complex with multiple gunshot wounds.

According to authorities, the confrontation began when 35-year-old Thomas J. Anderson arrived at his estranged wife’s apartment and discovered Mazariegos there. Anderson, who was armed, reportedly confronted Mazariegos; Mazariegos fled to his car but was pursued and shot by Anderson. Anderson County Sheriff’s Office deputies identified and arrested Thomas J. Anderson; he was charged with murder and possession of a weapon during a violent crime and booked into the county detention center pending a bond hearing.

Mazariegos was the son of the late Oscar Otoniel Barrios y Barrios and Trinis Mazariegos and is survived by his mother and his sister, Francisca Carlota Barrios Mazariegos. Funeral services were arranged in Anderson with final rites planned in Guatemala. Did anyone in the Anderson area see or hear anything that might help clarify what happened that night?