BUFFALO TWP — A Butler man is accused of using a webcam to videotape a friend changing clothes without the friend's permission.

Buffalo Township police Wednesday charged 29-year-old Derek Krallman with four misdemeanor counts of invasion of privacy.

Police said Krallman on Jan. 19 secretly set up the laptop computer video camera in the bedroom of a woman, the alleged victim, at her home on Howes Run Road.

But the woman's child discovered the spy camera set up the next day.

“The laptop was located beside her bed,” according to court documents, “and the cam was located on her dresser directed at an area where the victim would change clothes.”

The woman told investigators that she and Krallman were “just friends” and they were never involved in any other relationship.

She acknowledged that she allowed him in her house Jan. 19 but she knew nothing about the webcam.

Police said they subsequently obtained a search warrant to allow them to access and review the four videos captured by the hidden camera.

The first video, documents said, showed the defendant testing the angle of the webcam. The second video “shows the victim in the room changing.”

The other two videos showed no activity in the room.

According to police, when they contacted Krallman and asked him to explain his actions, he responded that it was “out of stupidity.”

A preliminary hearing in the case is set for Feb. 14 at the office of District Judge Sue Haggerty in Saxonburg.