I am sorry to here of your troubles, if you have not done this invest in a good said of Dead-Bolts for each of your doors and if its legal where you're at, a good security system. Most importantly keep a careful journal of all incidents related to this person, if he passes you a threatening note, pick it up with a pair of tongs or tweezers, put it in a ziplock bag and keep it with your journal. If you have to take this idiot to court, you will be well armed with evidence to support your allegations. I will pray for your continued safety, take care my friend.