That limit has since been lifted, but is not retroactive. Unless they did something that qualifies them for life in prison or the death penalty, you are probably out of time. This would also mean this person is now 65.
You should indeed contact an attorney to see about potential civil damages from the WTBTS and/or the offender but it will be an arduous process, things will have to be examined closely, expect old wounds that may have healed to be opened. You will also need some form of proof, with a bit of luck one of the younger elders may still be alive, but everyone else involved will have died. Whatever was on paper was probably lost or destroyed since.