Could I get sued for this?

About an hour ago, I pooped in a paper bag, lit it on fire, then dropped it off at my neighbor's doorstep. He is 82 years old and a very cranky old man. But then I realized that it's dog poop that you are supposed to do it with, because they could do DNA testing. So now, if he's smart enough, he could do DNA testing to find out who it was. Should I run away from home? Or should I admit to it and pay him to keep quiet?