Can you be sued if you admit too violating someones rights, years later?

Unfortunately your post is so general it's not possible to give you a meaningful answer. It depends on who the someone was for example what capacity they were in for example with a parent or preacher or policeman. Also depends on who the victim once minor child and adult client? Finally it depends on how many years have passed two years five years 50 years? So I guess the answer to your question is technically 'yes' . But that answer doesn't really address what I suspect you are looking for – whuch is for someone to address your particular issue.

There are too many facts missing to be able to provide a good answer. You need to call an attorney and explained your situation.