There is no Statute of Limitations on certain crimes, murder and in many states, Armed Robbery, for instance.
Rape and other sexual crimes leave a lasting scar on the mind and mental health of a person that is abused, and it never heals or just goes away.
While in this particular case the perpetrators are most likely long dead, the institution that protected them and hid their crimes should face the punishment that they deserve....................
I am aware that not all crimes have a statute of limitations. What I object to is making past allegations of crimes subject to statute of limitations being lifted for that offense. I think due process and other rights of a defendant are not protected when that happens. If the legislature of a state wants to lift the statute of limitations it should apply to crimes committed after the law has been passed.