Lawrence Janson was a 17-year-old senior at Olympic Continuation High School in Concord, California, when he was shot three times and killed on November 6, 2017. The shooting happened around 1:30 p.m. a block from the school near Salvio and Beach streets after Lawrence and a few friends left campus. A black sedan pulled up, an argument took place, a passenger got out and opened fire; Lawrence tried to run back to school but collapsed and later died at a hospital.

Police identified and arrested five suspects from Concord. Charges were filed against four: 20-year-old Kristhiam Uceda was charged with murder; 18-year-old Bryan Sermeno-Chachagua was charged with hiding the gun; two 17-year-old boys were charged, one with murder for driving the car and the other with hiding the gun. A fifth juvenile was taken into custody but not charged. Investigators recovered the vehicle and the murder weapon, reviewed school surveillance video and witness statements, and said the shooting was not gang-related. The motive remained unclear.

Lawrence was remembered at a makeshift memorial outside his school and by classmates who noted his involvement in wrestling and football. Anyone with information about that afternoon near Salvio and Beach streets is asked to come forward.