Placentia teacher, 35, accused of sex with female student

PLACENTIA, Calif. (KABC) -- A female teacher at Valencia High School suspected of having a sexual relationship with a female student was arrested Wednesday. Placentia police say they are looking for additional victims.

Rebecca Eileen Diebolt, 35, of Brea was arrested on suspicion of oral copulation with a person under the age of 18 and sexual penetration with a person under the age of 18.

The investigation began on June 4 after the victim called and told police about her sexual relationship with Diebolt, which she says began when she was 15 years old.

The victim told Placentia police that she first "formed a relationship" with Diebolt in 2004, when Diebolt was the victim's language arts teacher and swim/water polo coach.

Detectives say the victim and Diebolt were sexually involved between 2004 and 2008, and often engaged in sexual behavior in the suspect's classroom and home. The encounters occurred after school and on weekends.

The sexual relationship allegedly continued after the victim graduated from high school and attended college.

Diebolt was arrested without incident Wednesday as she exited her car in the parking lot of a shopping center.

The investigation is ongoing. Anyone with additional information or who may have been victimized by Diebolt was urged to contact Placentia detectives at (714) 993-8146.