Juan Luis Marquez, 41, a male Latino from Los Angeles, stepped into the narrow alley behind his family's home in the 8000 block of South Hooper Avenue on the night of August 16, 2025, after a car alarm split the quiet around 9:20 p.m. He and another family member had gone to check on the vehicle when they encountered three people attempting to steal it. As they confronted the group, a fourth person standing near the south entrance of the alley produced a gun and opened fire.
One of the victims returned fire in apparent self-defense, but Juan Luis Marquez was struck in the upper body and died at the scene; a second victim was hit in the leg and survived.
Deputies and paramedics found Juan Luis Marquez, 41, male, down in the alley while his son was transported for treatment of a gunshot wound. The Los Angeles County Medical Examiner later recorded the death as a homicide, noting a gunshot wound to the chest and listing the place of death as the walkway of a residence. The gunshots shattered the brief calm of the block, leaving the family to absorb the blunt finality that followed the sirens.
Detectives said the assailants fled west on 81st Street in a newer red or burgundy four-door sedan; later, investigators released images of a red or burgundy Kia K5 believed connected to the crime and said the vehicle might show damage from gunfire. Authorities also indicated one of the suspects could have been wounded during the exchange. In the days that followed, the details hardened into a stark picture: an attempted theft in a dim alley, a sudden ambush, and a family left to mourn a husband and father of four.
As of mid-September 2025, investigators described the suspects as four juveniles and announced a $10,000 reward for information leading to their arrest and conviction. No arrests were reported at the time of the announcement, and detectives urged the public to study the released vehicle images and come forward with any leads. The appeal carried the voice of a homicide lieutenant who called Juan Luis Marquez, 41, male, an extremely hardworking provider, and underscored the case's unresolved edges—the car alarm, the alley, the fleeing sedan—that still needed names.
