Sam LaCara

Students from the Louisiana Schnell School walk past law enforcement officers after being evacuated following a shooting at the school in Placerville. (AP Photo)

NorCal School Janitor Tells Police He Was Fired Before Shooting

A school janitor told investigators he went home and got a gun before returning to an elementary school and killing the principal who had fired him several hours earlier.

CBS San Francisco–02/03/2011