I was unaware that there was a statute of limitations on pedophilia.
In most states can't be sure of all states, all sex crimes had a statute of limitations. Because children would not report the abuse until after they turned to be an adult, many states expanded the statute of limitations to 5 years after the victims turned 18. Then other states expanded it even further for sexual assault and removed the statute of limitations.
But 40 years ago, most if not all states had a 5 year statute of limitations for sex crimes.