An 18-year-old Rocklin High School Student was arrested for reportedly bringing a firearm to school on Friday. Police were alerted by a Rocklin youth Services Officer who was notified of a student possibly bringing a gun onto campus. Police arrested 18-year-old Jacob Clark at his home, recovered the firearm and booked Clark into Placer County Jail with Bail at 25 thousand dollars. Police officers are planning to be at the Rocklin and Whitney High Schools today to further investigate.