LAWRENCE (AP) — A Lawrence man accused of secretly videotaping people in clothing store dressing rooms pleaded not guilty to the charges.

Thirty-five-year-old Orion M. Graf waived his right to a preliminary hearing Monday and entered the plea to 10 counts of felony breach of privacy. His trial date was set for May 14.

Authorities allege that the crimes occurred between November 2012 and February 2013. They have refused to name the stores involved.

The Lawrence Journal-World reported Graf was a 35-year-old University of Kansas graduate student when he was first arrested last February. He was arrested again in July after detectives searched several Lawrence stores.