I would have that SOB ass. Hell I almost came to blows over someone else's dog but he was treated much worse.
My dad and I went to Rockport,TX when my mother and her friends (with my fiance) took a trip to Las Vegas.
We brought the bay boat but the first night there we grab a 6 pack of shiner bock and walked out to the end of the dock just to shoot the shit and get our lines wet. About 30 minutes later we saw a Nice black lab run out on another dock. No big deal...right. Then I saw to Vietnamese (found this out afterward) walking to the dog. No big deal...right. Then they looked like they were stalking it. By then I thought WTF and started walking over there...To F**king late. They had a pole with a rope on the end, around the dogs neck, then drowned it. I was yelling the whole way down our dock.
By the time I hit the shore the dog was dead. I went to my room to get my cell phone (didn't have it...didn't want to get any calls) to call the LE's. They got there about 5-10min later the Benji-Eaters moved down about 300 yard in between two boat storage areas and were skinning the damn thing. LE's came took them, cuffed them, and put them in the car. I got the officers number just in case I saw the owner.
I did about an hour later it was a whole family looking for the dog. I took the father aside and told him the story. First it looked like I hit him with a baseball bat then you could tell he was pissed. He gave his wife the short story then asked if I could drive him back to his car, but I took him to the station. They still were not should how much they could get the guys for. I gave them my story, but it was mine I would most likely be in prison now