Philadelphia ? A suburban Philadelphia landlord placed hidden cameras throughout his apartments and secretly videotaped female tenants for years, investigators said Monday.

Thomas Daley, 45, of Phoenixville, is accused of wiretapping, invasion of privacy and criminal use of a communications device, among other charges stemming from the police search that yielded cameras behind mirrors and in cabinets and ceiling fans, police said.

Hidden cameras and audio equipment were found in the bedrooms, bathrooms and living rooms of at least three apartments he owned in Norristown, police said. Altogether, 16 apartments have been searched or are in the process of being searched.

“He had such an elaborate system set up that when someone in the apartment would activate a light switch or a ceiling fan, he was able, via the Internet, to retrieve the video images or audio,” Montgomery County District Attorney Risa Ferman said.

No cameras were found in apartments currently rented by men, she said.