Ex Trying to Win Me Back

Cassandra
So my ex is back in town after having a baby with someone else (cheated on me, I mind you). He claims things aren't going well with his baby's mother. He knows I'm committed and faithful to my husband. He's been trying to get my attention by coming to our bedroom window at night and knocking. We've called the police 6 times and every time we call they say, "we haven't been able to locate him. There's nothing we can do about it." We got him on surveillance cameras we've installed outside of our house. He lives only 5 houses down from us. And he's got a criminal record for domestic violence. It shouldn't be hard to locate him. He's not getting the memo that I've been done with him. This move could not come faster. What should I do? #Donewiththisplace