I am in the same boat. He now teaches swimming classes to kids after he raped me when I was 14 (he was ~40).
Police said there was not enough proof and it would ruin his life. I also got a threat of him sueing me for putting dirt on his name (idk the english word).
I gave up because they made it very clear that I had no chance. I go the word of mouth route now. Hard to prove the source for that.