BUTLER TWP — A township man was caught with child pornography when he sent his computer's external hard drive for repair, authorities said.

Thomas J. Perantoni, 65, was to turn himself in to authorities today at the office of District Judge Kevin O'Donnell in Butler Township, for arraignment on 20 counts of possession of child pornography.

Butler Township Police on Wednesday charged Perantoni following a 10-month investigation.

Police said that the co-owner of Digital Technologies at the Greater Butler Mart contacted them Feb. 16, to report finding “questionable images and videos of child pornography involving young girls” on the defendant's hard drive, according to court documents.

Two days earlier, police said, Perantoni had brought the hard drive to the store for repair work.

He advised that he “wanted to get all his files off it because the circuit board inside was fried,” the co-owner told investigators, referring to the defendant.

While transferring the files from one hard drive to another one, as part of the repair process, the store official discovered one file containing alleged sexually explicit videos and photos.