I'm not a lawyer, but there is probably a statute of
limitations on something like that. It would probably
depend on what state you live in.
In New Jersey, for instance, it's two years:
(removed)
clientID=281262&Depth=2&depth=2&expandheadings=on&headi
ngswithhits=on&hitsperheading=on&infobase=statutes.nfo&
record={EB}&softpage=Doc_Frame_PG42
So, I don't think you'd be able to file suit there.
Talk to a lawyer and see if you have have enough
evidence on your side to do something with.