Authorities in the Grundy County town of Mazon are going to the public in their quest to find a young woman who marred the town's Halloween "Dungeon of Terror" with some real violence.

Law enforcement authorities said Friday they are looking for the young female visitor who struck 65-year-old volunteer Nancy Bjelland in the head with a hard object while touring the dungeon a week earlier.

Bjelland, who lives in Dwight, was taken to Morris Hospital for X-rays and treatment, but returned to play her costumed role at the Dungeon.

Authorities are now circulating a photo of the visitor, who reportedly became angry when Bjelland barred her from grabbing one of the Dungeon's attractions — a robot dog.