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Jerry Sandusky's youngest adopted son decided to disclose his own molestation earlier this month in hopes of showing his family the truth about his father, according to a taped interview with Pennsylvania State Police aired by NBC News.

"So that they can really have closure and see what the truth actually is," Matt Sandusky explained in a clip of that tape played Tuesday on the "Today" show.

The younger Sandusky, 33, stunned the nation last week when he publicly alleged he, too, had been molested by his father. The accusation came just days before the former Pennsylvania State University assistant football coach was convicted of 45 counts of child sex abuse involving 10 other boys.

Prior to Matt Sandusky's public accusation, he had been named as a potential defense witness in his father's trial.

He said in a statement issued by his attorney last week, that midway through the trial he had a change of heart and offered to testify for the prosecution.

In the state police interview -- taped shortly after Matt Sandusky first contacted prosecutors -- he alleged a pattern of abuse similar to that described by the eight other young accusers who took the stand. He said, however, that he was never forced to participate in oral and anal sex as some of the other victims alleged.

"The showering with the hugging with the rubbing with just the talking to me," Matt Sandusky said.

He told investigators that he often curled up in the fetal position in his bedroom to hide from the former coach and once fled from the Sandusky home barefoot hoping to find help at his grandfather's home.

"I really wanted to die at that time," he said.

The former coach's lawyers have denied the allegations from their client's son and questioned why the man previously told a grand jury that he had never been abused by his father.

On the tape aired Tuesday, Matt Sandusky told police investigators that he had recently began therapy and many of these memories had only recently come to the surface.

Jerry Sandusky formally adopted Matt Sandusky -- then Heichel -- when he was 18 years old.

The two first met when the boy was 7 at a camp run by the Second Mile, a charity for underprivileged youth where the former coach met all of his known victims.

Jerry Sandusky remains in the Centre County Correctional Facility awaiting a sentencing hearing that is expected to send him to prison for the rest of his life.