REPORT HIM

I feel you definetly need to go to the authorities. Slander is only if he really didnt say those things, and you just made it up to discredit or humiliate him..Not the case. If he said that than slander is not an issue. You need to go to the police and tell him he said this. This is serious..He will do it again..And he has done it before..People dont just do it once. He must be held accountable for what he has done.You could sue him, but most importantly you have to report him.