Camden County Prosecutor Warren W. Faulk reported a plea Thursday from a former custodian at Gloucester Catholic High School who admitted to surreptitiously videotaping students and teachers at the school.

John Martin, M/42, of the first block of S. Jefferson Avenue in Wenonah, pleaded guilty Thursday to 3rd degree Invasion of Privacy and 3rd degree Endangering the Welfare of a Child. The plea carries a term of parole supervision for life. Martin will also have his name added to New Jersey’s Megan’s Law registry, a list of the state’s convicted sex offenders.

Martin, who was chief custodian at the private high school, resigned from his position in November.

Martin admitted to directing the installation of hidden video cameras throughout the high school that recorded individuals in various stages of undress and activity. The pinhole-size cameras, approximately a quarter of an inch in diameter, were placed in eight separate rooms, including classrooms, the school’s choir room, weight room, backstage area, maintenance facilities and football area, and were hidden in locations such as ventilation ducts and smoke detectors. Students, including at least one youth under the age of 16, used some of those rooms as changing areas and some of the images show nudity. Martin linked the cameras, which were installed without the school’s knowledge, to the existing video security system at Gloucester Catholic. Martin possessed hours of video footage and a large cache of pictures which appear to be screen shots taken with his cell phone from the video.

Martin is scheduled to be sentenced before Superior Court Judge Lee Solomon on December 13, 2013.