Police in Mount Shasta City have arrested a high school student for making threats they believe he was going to carry out. Mount Shasta High School officials called police on Monday to report getting threats of a school shooting by a 16-year-old boy. A search warrant was served Tuesday at the boy’s home and officers found a Shotgun, two semi automatic rifles and about a Thousand rounds of ammunition. The boy was booked into Juvenile Hall for terrorist threats.