A former West Rusk High School teacher was in court Wednesday on felony charges of invasive visual recording in a bathroom or dressing room.

Joshua David Pero, 35, who taught English. English honors and world geography, heard from prosecutors during the hearing at the West Rusk County Courthouse. Investigators said they were still looking at forensic evidence.

According to court documents, the incident happened in May but Pero wasn't charged until September.

Parents of one of the victims tell CBS19, three girls were asked to participate in a 'social experiment' in order to receive extra credit for a failing grade in their English honors class.

The girls were allegedly asked to change outfits three times during the school day in order to document whether or not people noticed.

The parents say Pero asked the girls to change in a room adjacent to his classroom. The victims claim they discovered a camera in the room and reported it.

Pero is no longer employed by West Rusk County Consolidated ISD, according to the district. It's unknown if he resigned or was fired.

The district released a statement to CBS19 that read in part:

"This matter has been turned over to law enforcement and we are cooperating with them."

"West Rusk CCISD administration acted appropriately and quickly by following the reporting requirements to law enforcement, Texas Education Agency and State Board of Education."

Pero was released on a $15,000 personal bond. He declined to comment about his charges.