First time call the police

The bar by the mailbox was broken. i fount out it three days ago. Someone didn't like my mailbox. She twisted the bar and made it toward south instead of in a horizatal way. I put it back to lay one the small knot by the side of mailbox. A few days later, she came out and twisted it again. She made the bar off the mailbox and toward the ground. This way she is playing this game with me for two months. Finally, the bar broke. i took the bar to the officer. i asked them to find if there was a finger print on it. i have been thinking who is doing it. She is doing it so many times in so many days. Why did she hate me so much? We havnt known each other long enough to accumulate these much of hatrate. We didn't talk to each other not even ten senses.