STATE COLLEGE, Pa. — Jerry Sandusky’s son told police he was abused starting when he was 8, a decade before the former Penn State assistant football coach adopted him, according to a police interview recording obtained by NBC News.

Matt Sandusky, who was adopted by Jerry Sandusky as an adult, described for investigators showering with the ex-coach and trying to avoid being molested in bed. He also said he was undergoing therapy and that his memories of abuse were only now surfacing.

“If you were pretending you were asleep and you were touched or rubbed in some way you could just act like you were rolling over in your sleep, so that you could change positions,” the now-33-year-old Matt Sandusky said in an excerpt played Tuesday on NBC’s “Today.”

His attorneys confirmed the recording’s authenticity to The Associated Press.