A Vacaville man faces 1 count of involuntary manslaughter in connection with the Sunday night shooting death of 19 year-old Vacaville resident Isaac Lopez. The 2 were sitting in a car with 2 friends when the shooting occurred. It has been determined that Lopez’ 18 year-old friend Javier Calvo was holding the gun when it went off. Calvo was booked into the Santa Cruz county jail on one count of involuntary manslaughter. His bail was set at a quarter-million dollars.