William Benjamin Harris IV, 19, was fatally shot on June 10, 2019, while walking with a 17-year-old boy on the 2100 block of Santa Anita Avenue in Altadena. The medical examiner recorded a gunshot death; a man in a passing vehicle opened fire, killing Harris and wounding the teenager. Motive has not been disclosed and the circumstances remain under investigation.

Authorities arrested 28-year-old David Gregorich of Pasadena and charged him with Harris’s murder, the attempted murder of the 17-year-old, and shooting at an inhabited dwelling. The complaint alleges use of a rifle to inflict great bodily injury. Gregorich pleaded not guilty and was being held at the North County Correctional Facility in Castaic on $4 million bail. Police matched a pickup truck to the vehicle description after officers responding to a family disturbance on June 17, 2019, pulled over and detained Gregorich and another man and turned them over to the Los Angeles County Sheriff’s Department.

What details about Harris’s last hours or the vehicle involved might help move this case forward for investigators or anyone with information?