OAK HARBOR, Wash. -- Detectives said they are looking into whether there are more possible victims of a middle school teacher who is accused of fondling a 12-year-old girl.

Police arrested James Pruss, 52, last month on suspicion of touching the girl inappropriately during gym class.

Pruss faces a charge of fourth-degree assault with sexual motivation. He's on indefinite administrative leave.

"The teacher says it was accidental, incidental, and the investigation is ongoing," said Joe Hart of the Oak Harbor School District.

The victim's mother, Andrea Bridge, said Pruss grabbed and squeezed her daughter's right breast while they were on the basketball court.

"She looked up to teachers and saw them as adults you can trust," Bridge said. "And that's been shattered."

Bridge said she found a stack of complaints against Pruss, accusing him of looking down girls' shirts and touching them in inappropriate places.

The school district acknowledged that there have been dozens of complaints against the teacher.