CINCINNATI (AP) — Ohio investigators found improper use of college interns, among other violations of procedures, by a private adoption agency that helped place children with an adoptive father accused of raping three boys in his care.

State files obtained by The Associated Press through public records requests show that the Ohio Department of Job and Family Services investigated the private agency in the aftermath of the February arrests of the 40-year-old Troy man. The state findings listed 12 problems; in most cases they involved incomplete records and lack of documentation. They also found that college interns improperly conducted some home assessments and post-placement visits alone.