My tires were slashed when I was in high school. Since I didn't "see" who did it, the police couldn't do anything. Although, a week later the "jocks" in my english class were making jokes about it. I knew that they did it.....I'm sure they were burned by karma since.
people suck most of the time. but kitties are great! 
at least you're getting things cleaned up, that's always nice.