Photo: WJAC

A Pennsylvania mother is accused of burning her three-year-old with chemicals, putting him on a leash and keeping him in a dog cage.

Police in St. Marys charged Arwen Kuhn last week with a slew of charges including aggravated assault and false imprisonment of a minor.

According to a police affidavit, the child's dad says he dropped the boy off at Kuhn's house for three days last year. He says when he picked the child up, he noticed a scab on his bellybutton and bruises on his head.

Investigators say they determined the 38-year-old Kuhn dropped the boy on his stomach and burned him with chemicals, in addition to leashing him and locking him in a cage.