Crimes that are considered exceptionally heinous by society have no statute of limitations. As a rule, there is no statute of limitations for murder.
Generally when the supposed murderer is dead the statute of limitation is over. I can quote many cases even up thread that can prove that.
Anyway his statement that the bible is inrefutable is laughable.
Unfortunately he's not the first one to do this, he just may be the first one to bring it to a civil court. For thousands of years Jews have been executed because of these allegations.