San Jose Police say they found child pornography at the home of Juan Jauregui.
They also found images of the Saratoga High School custodian molesting the young girl, who was a family friend.
Jauregui has worked for the Los Gatos-Saratoga High School District for 13 years. He is currently under administrative leave.
Authorities believe he is driving a 2004 silver Nissan Altima, with a California license plate number 5GJF943.