The firearm was a BB gun. The cats were probably a nuisance to him so he shot one. All the cats on my dead end street know to stay out of my back yard. They probably heard about all the squirrels and raccoons that were felled by .177 hollow point lead pellets at 1,020 f.p.s. courtesy of Gamo. There was a big gray Tom that used to sit just outside of the rear sliding glass door at night to taunt my dog when he was still alive. About the third time that happened I cocked the Gamo and the pellet just missed the cat who was lucky it was dark. I never saw that cat in the back yard again.
Do you do the same with nuisance neighbors or will it be ok if they do unto you?
You probably deprived your dog of his only nighttime entertainment.
And that is no reason to shoot at a cat.
Did you misss the part where he shot the cat on a neighbor’s balcony. Is that okay with you?
If he killed a cat with a “BB gun” at an apartment complex in the greater Austin area, his shot placement is better than his judgement.