A Coworker Has Tampered With My Gas Tank. What Is The Best Course Of Action?

Location: MINNESOTA

Hello, everyone!

This past Monday after I finished my shift, I noticed that my gas tank was opened and the gas cap was taken off. To make the situation stranger, it was obvious that snow had been shoved into the tank... (I know this because we had gotten snow over the weekend, so I needed to scrape my car, and my tank was shut and intact when I was scraping.)

I've already been in contact with my company's security team and they're going through camera footage (which is going to take a minute because they have multiple cameras and around 8 hours to go through.)

Now comes my question: When we figure out who it was that tampered with my vehicle, what is the best course of action legally? How can I go about this without putting a target on my back?

For added context: As of right now, the car is fine and I've been driving it in small 10–15-minute increments. I don't engage in any behavior that would cause this kind of retaliation, but I've been harassed at my work before by a couple (man and woman), and I'm inclined to believe this is their doing (I'm also trying to not point fingers at them, and I'm naively hoping this is all a weird coincidence that I can put behind me.) This caused me a lot of stress and anxiety (I'm diagnosed and medicated for it), and my car is very valuable to me. It was my grandpa's before he passed away and it means a lot more to me than if I were to purchase it myself because it's one of the last things I have of his.