In any case - not just this one - I would say that crimes which took place earlier than 1985 are almost impossible to prosecute, because so many decades have passed.
We have Dolours Price’s very relevant testimony as to Adams’ involvement. The McConville family have the names of the men who dragged Jean McConville out of her tub in 1972. We also have the tape recordings from Boston University. A judge has ordered a portion of them released. Bad times for Gerry.
Many of the crimes can’t be prosecuted because of the amnesty agreement as part of the peace agreement. Gerry should be fine.