STATE COLLEGE, Pa. — Jerry Sandusky's son, Matt, recalled showering with his future adoptive father as a boy and pretending to be asleep to avoid being touched — memories that surfaced recently, according to a police interview detailing the earliest allegations yet of abuse by the former Penn State assistant football coach.

Matt Sandusky, 33, said the abuse started at age 8, a decade before he was adopted by the once-heralded defensive coordinator, according to the interview, reported Tuesday by NBC News.

His attorneys confirmed the recording's authenticity.

Jerry Sandusky, 68, was convicted last week of 45 counts of abusing 10 boys he met through the charity he founded — the same organization that introduced him to Matt Sandusky, who became his foster child.

Matt Sandusky did not reveal abuse when he was questioned as a grand-jury witness but did release a statement that alleged past abuse as the jury was in deliberations last week. He said on the tapes he tried to flee Sandusky's house and also attempted suicide.

Debra Long, Matt's birth mother, said she fought the Centre County court system over her son's placement in Jerry Sandusky's home. She told The Associated Press that Jerry was pushy and controlling and estranged Matt from his birth family.