My new neighbours have an off-leash pitbull roaming the neighbourhood and I’m terrified

My new neighbours who just moved in have three pit bulls! They leash two, but the third is always roaming freely around the neighbourhood. It’s constantly going from lawn to lawn, and honestly, it’s freaking me out. I have a Pomeranian and a cat (I sometimes take her out on a leash just to chill). My dog was attacked by another neighbour’s pit bull in this area before, so I’m already scared of them. The idea of walking my dog and running into this one off-leash is terrifying. What if it attacks us?

To make things worse, this dog keeps pooping on my lawn. I brought it up to the owner, and he literally laughed it off like it was no big deal. Now, I can’t even let my own dog on my lawn without double checking the lawn because he’ll step in it. And it’s not just me I’m worried about… there’s an elderly woman who lives downstairs in the same house as me. She wouldn’t be able to defend herself if this dog ever decided to go after her.

I don’t know what to do at this point. Has anyone dealt with a situation like this before? How did you handle it? Talking to the owner isn’t working.