12/12/2012 04:37 pm ET

David Anderson, Accused Of Posing As Doctor, Conducting Invasive Exams And Filming Them

A man is accused of posing as a doctor to conduct invasive bogus exams on women while using his bathroom to tape underage girls without their knowledge.

David Anderson, 44, was arrested Monday and pled not-guilty in Newburyport District Court in Massachusetts to various charges, including possession of child pornography and four counts of photographing an unsuspecting nude person.

The Boston Herald reports that Anderson allegedly created a scheme in which he posted Craigslist ads offering woman anywhere from $25 to $50 to take part in clinical research. Anderson then supposedly told victims they needed a “baseline internal exam,” performed by him. The examinations were surreptitiously filmed by Anderson, cops said.

Police don't know how long the scheme went on, but one of the videos had timestamps from 2008. Anderson's estranged wife blew the whistle on the seedy quackery.

"Based on the number of images, probably thousands, it appears that it's been going on for a while," Salisbury Police Chief Tom Fowler said, according to the Hartford Courant.

Apart from the scam exams, cops also said they found footage of four girls, between the ages of 10 and 14, that Anderson secretly recorded in his bathroom. Those videos and other images of child pornography were allegedly found on one of Anderson's computer hard drives seized from his home.

Anderson's bail was set at $500,000. MyFox Boston reports that Anderson's lawyer said the bail was excessive and his client is not a flight risk.