SANTA ANA, Calif. — A quiet afternoon in the Artesia Pilar neighborhood turned deadly when 58-year-old John Albert Guillen was shot and killed in broad daylight near Third Street and Daisy Avenue. The incident has now escalated into a full homicide investigation, with police still searching for the person responsible.
Officers with the Santa Ana Police Department responded shortly after 12:30 p.m. following multiple reports of gunfire in the residential area. When they arrived, they found Guillen suffering from a gunshot wound to the upper body, just moments after the violence unfolded.


Emergency crews from the Orange County Fire Authority rushed in and tried to save his life at the scene. Despite their efforts, Guillen was pronounced dead right there in the intersection.
Investigators believe the shooting happened as Guillen was getting into his vehicle. Early findings also suggest the possibility of gang involvement, though police have stressed that the case is still active and developing.
The scene quickly turned into a heavily secured crime zone. Several streets were shut down as officers placed yellow tape around the area. Witness footage showed a heavy police presence, with investigators working carefully around the intersection while a canopy was used to shield the victim from public view.
At one point, officers expanded the perimeter and used patrol vehicles to block visibility as they processed evidence. The neighborhood remained tense for hours as detectives worked through leads and gathered witness accounts.
Authorities initially believed the victim may have been shot in the head, though later confirmation identified his injuries as being to the upper torso. The suspect fled the scene and has not yet been identified or arrested.
By around 7 p.m., the area was cleared, but the investigation continued behind the scenes. Detectives are still piecing together what led up to the shooting and who may be responsible.
Police are asking anyone with information to come forward and assist in the ongoing homicide investigation.