CHICAGO (CBS) -- A man shot and killed a dog after the animal broke free from an owner's leash in the Albany Park neighborhood Monday evening.

At 6:50 p.m., a 41-year-old man in a wheelchair was with his dog, heading north on Pulaski Road near Montrose Avenue. A 33-year-old man was on the sidewalk when the dog broke from the owner's leash and approached the younger man, police said.

The 33-year-old man took out a gun and shot the dog, police said.

The dog's remains were taken to a nearby veterinarian, police said.

The dog was reportedly muzzled.

"And I saw this guy, like, pull out the gun, and he just shot the dog. So I just stayed in the car for, you know, a couple of minutes – like shocked," said witness Alisa Bondarenova.

"And then he was still – he didn't run away. He was still walking around here, this guy, with a phone. And yeah, it was horrible."

The man who shot the dog, a valid Firearm Owners Identification Card and Concealed Carry License holder, was not charged or cited.