Squatters moved into the vacant house next door

Long story short I bought a house last year downtown and the house Nextdoor has been vacant since I bought it. Last week I saw some flashlight activity through one of the windows. At first I was kind of excited cause I thought that maybe I was getting new neighbors or that someone was going to buy (and maybe fix up?) the house.

I was wrong. I kept an eye out and watched a man and women cut through my backyard with some garbage bags and go in an out of the house. They’ve been living there ever since. They only ever go out the back door and keep cutting through my property. I know they’re not tenants or the owners of the property. We occasionally hear them screaming at each other. They seem pretty out of it.

I’m pretty worried about the whole situation because I travel a lot for work. I’m only in town like half the time. I’d really hate it if someone broke into my house. I called and spoke with the non emergency line at the police department and they can’t do anything. I looked up the tax info to find the owner but can’t find any contact info online to notify them of the intruders. It seems like the previous owner died and a daughter now owns the house but has not been maintaining it but is up to date on the taxes.

Does anyone have any advice for me? I’m not sure what I can or even should do?