Authorities have announced further criminal charges against a Maryland high school employee accused of secretly recording female students in a changing room. Investigators have identified eight more alleged victims, bringing the total to 12.

James Mulhern III, who worked at Walter Johnson High School in Montgomery County, faces 12 counts of abuse of a minor. The investigation expanded after newly recovered videos showed 12 students in varying stages of undress.

The case began in April when two students discovered a video camera in the school’s theater control booth. They checked the memory card and found recordings from the girls’ changing room. The students then informed school administrators.

In Loudoun County, a high school student is under investigation for filming peers in a bathroom.

Footage showed an adult male placing the camera and then leaving the room. The school’s principal identified Mulhern, a media services technician, as the individual.

Police executed search warrants at the high school and at Mulhern’s Clarksburg residence. They seized numerous electronic devices and other evidence. This led to the identification of additional victims and videos dating back to 2015. Initially, Mulhern faced charges for four victims.

A California teacher was arrested for alleged sexual conduct with a student at a charter school.

Mulhern appeared in court regarding these new charges. A judge released him on a $100,000 unsecured personal bond, stipulating he must avoid Walter Johnson High School, not contact minors, and only interact with his 4-year-old son under supervision.

Montgomery County State’s Attorney John McCarthy noted that the new evidence increased prosecutors’ concerns. Mulhern, if convicted of all 12 counts, faces up to 300 years in prison. Each count carries a maximum sentence of 25 years under Maryland law.

Fox News Digital contacted the Montgomery County State’s Attorney’s Office for further comments on the case.

Brittany Miller is a breaking news writer for Fox News Digital who previously reported for the Independent. She graduated from Syracuse University in 2023.