St. Clair County sheriff's detectives are investigating a female Boy Scout leader who is accused of molesting a teenage boy on Sunday.
"The boy's parents called us when they came home, and their child was having sexual intercourse with an older female in his bedroom," Sheriff's Capt. Steve Johnson said. "They blocked the female from leaving until deputies arrived.
Deputies arrested the woman, who is being held in the county jail. She has not been charged.
Investigators are checking when the relationship began because it is known that the female is involved with Boy Scout Troop 35 in O'Fallon, and the boy also is involved with the troop.