NORWALK, Ohio (AP) -- A state legislator surprised a high school class when the computer he was using projected a photo of a nude woman during a lecture on how a bill becomes a law.

State Rep. Matthew Barrett was giving a civics lesson Tuesday when he inserted a data memory stick into the school computer and the projected image of a topless woman appeared instead of the graphics presentation he had downloaded.

Police interviewed Barrett and school officials and seized the data memory stick and the computer to determine where the image came from, a state highway patrol spokesman said.

Barrett said there were a few snickers from the approximately 20 students in the senior government class at Norwalk High School when the image appeared. He said he immediately pulled the memory stick out of the computer.

The legislator said he finished his lecture using printouts and then met with the school's principal and technology staff, who examined the stick. He said the school's technology director determined the stick had a directory of nude images in addition to Barrett's presentation on civics lessons.

"I have no idea where these came from," the Democrat said.