An O'Fallon, Mo., man is accused of assaulting a girl with a cognitive disability when she was 9 or 10, according to court documents filed in St. Charles County.

James D. Walker, 56, of the first block of Northwood Drive in O'Fallon, is accused of assaulting a girl who was a friend of his son between August 2016 and July 2017.

On one occasion while she was sleeping over at Walker's house when she was 9 or 10 years old, the girl awoke to see Walker watching pornography. Walker allegedly exposed himself to her and then grabbed her hand, making her touch his genitals, according to court documents. He also touched the girl's chest.

Walker allegedly threatened the girl and her family if she ever told anyone about the incident, according to court documents. The girl returned to her home in the middle of the night, upset, according to court documents.

Walker allegedly groped the girl in a second incident, at which point the girl screamed and another person entered the room and told Walker to stop.

In the time frame when the incidents are believed to have taken place, the girl's mother said the girl began to act out emotionally and displayed suicidal tendencies.