u/Unfair-Tumbleweed-13

Been living in my building for around a year and have noticed HUGE poops on the street and today I finally caught the responsible dog owner. He told me to shut up when I asked him if he was just going to leave the poop there. Thing is he lives in my building but I guess he strategically makes his dog poop in the building next door. I have a picture of him and the dog, where should I complain?