I think somebody tampered with my family's car (Old NE)

My aunt has been staying with me for a few weeks. She moved from NY and her new place isn't ready yet, so she's been staying with us and parking on the street.

Since she moved in, someone has left bags of dog shit on her car at least twice. I couldn't believe it, given that I've never experienced anything like that, but maybe it's because of her NY plates? Anyway, my aunt was driving her car the other day and it broke down in the middle of the road. We just found out that it was due to a contaminated fuel pump and now we're thinking that maybe that same dog shit person tampered with the gas tank.

I'm totally baffled. I love our city and can't really believe I'm posting this, but has this happened to anyone else??