Pastor Joseph Angel Olvera of Lifeline Ministries, 54, is accused of inappropriately touching an 18-year-old female on Aug. 22. The teenager was living at the church as part of an outreach at-risk youth program.
According to authorities, Olvera allegedly fondled her while she was in bed, reaching under her shirt and fondling her breasts.
The suspect is also said to have slapped the victim's buttocks while passing each other in the church's hallway three days later on Aug. 25.
Olvera has been charged with two misdemeanor counts of touching an intimate part of another person.
He posted $10,000 bail and is now free from custody.
Anyone who knows of additional pertinent incidents or other possible victims is urged to call Fullerton Police Department Detective Ron Bair at (714) 738-6762.