Fond du Lac County Executive Allen Buechel said someone has been repeatedly stealing toilet paper from the men's public bathrooms at the Fond du Lac City County Government Center since June.
Buechel suspects the person comes in once or twice a week around midday and gets about six rolls a week from dispensers. Some rolls weren't even full, he said.
The thefts haven't been a big loss.
"We don't buy the best toilet paper," Buechel said.
He expects the thief to get caught. "Someone is going to walk in on him when he's doing it and we'll catch him," he said.
Courthouse officials are on the lookout for suspicious activity.
County sheriff Capt. Dean Will didn't return a call for comment Friday.