My MIL has been doing foster care for about 10 years. All her kids are grown and out of the house. Last year she adopted a 13 (now 14 year old) that had been in their house for about 1.5 years.
Cut to the chase.....she called us to say that she found a drawing in his pocket while doing his laundry. It was a drawing of their basement and if said something like " hey kids do you want some candy, come down here" and the word "rape" written on the paper. He is denying that he wrote "rape" and says his friend did.
I know he had some mental abuse from a previous foster family, not sure about sexual abuse though.