A Montgomery County man is accused of forcibly extracting teeth from a 4-year-old autistic boy, prosecutors said. 

Nicholas Kernechel, 27, faces aggravated assault and related charges in what prosecutors have called a horrific case of child abuse.

Kernechel was babysitting the boy, who is the son of his girlfriend, when the abuse occurred. He sent him to bed, crying and bleeding, prosecutors said.

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The victim's 's mother discovered the boy — identified only as JN by prosecutors — sleeping on the floor in a pool of dried blood when she went into his room in the morning.. 

She brought the boy to the Upper Perkiomen Police Department, along with a bag containing three of the teeth.

"The teeth were bloody but intact, from the tooth through the top of the root," authorities said in a statement.