If you're not in therapy, get into therapy immediately. You're going to need help with this.
And then, ask your friend which prosecutor to contact in WV. Or, if you don't want to go through him, contact the West Virginia Attorney General's office to ask if there's an open case on your perp: http://www.wvago.gov/contact.cfm
There's still a chance he's still abusing, even in his 70s.
"There is a Catskill eagle in some souls that can alike dive down into the blackest gorges, and soar out of them again and become invisible in the sunny spaces... even in his lowest swoop the mountain eagle is still higher than other birds upon the plain, even though they soar." -- from Moby-Dick