Legally what could I do to get this to stop

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When I was 16 I was raped by a 55 yr old retired fireman. Of course he never even had to go to court and charges never brought due to the fact that he was best buds with most of the town. He said I was lying because I was a poor kid who wanted to try to get his money. Of course I did not. It was devastating and I never pressed it harder because the cops treated me more like a suspect than a victim and I knew that court would be even harder. Not to mention I was afraid. He even called and threatened me on his way to the police station. Now of course it is too late to do anything but that is not my main concern. I am worried about the fact that he enjoys driving down my parents road on a daily basis and wave. Yes, he waves. What the heck!! I now have a 6 yr old who goes to grandmas a lot I worry about. And there are a lot of young children that live near there that are always outside playing. I am so scared that he will do it again. Plus, I find it as pure harassment, but what can I do when he is not actually breaking the law? I thought about knocking on doors to tell people about the child molester who lives but a block or two away but would that get me into any kind of trouble. It is really hard to see the man who took my innocents just drive by and wave like nothing. I wish there was someway to stop him. When this happened over 10 yrs ago it was in the newspaper with his name and that he raped a young teen. A lot of women, about 20, came forward with similar stories. Some from as long as 20 yrs before that. It makes me wonder how many since? I would appreciate any ideas to help detour him from harassing my parents and myself. Thankfully he has no clue where I live or work.