Son of a dog

A man in a plaid shirt bends over and then lies on his back on a rooftop, clutching his chest in apparent distress, while a German Shepherd dog stands on a ledge above him, barking. The scene shifts to a man in a dark jacket holding a handgun, aiming it forward, with the dog visible on a ledge behind him. The setting is a flat rooftop with palm trees and buildings in the background.