Pennsylvania State Police have charged a Crawford County woman with homicide for poisoning an 11-year-old child.

Mary Diehl, 62, was arrested Monday night. She is behind bars in the Crawford County Prison without bond.

The investigation started Sept. 6 when troopers were notified that the child's adoptive mother, who is Diehl, found the 11 year old dead in his bed at a residence on Mallard Rd. in East Fairfield Township, State Police said.

Blood test results were obtained and showed poison in his blood, according to investigators.

State Police did not disclose what was used to poison the child and said the investigation is ongoing.

Diehl's preliminary hearing date has not yet been set.