The person shooting the video keeps filming as he or she walks around a car. Through that vehicle's windows, it appears the 59-year-old kicked Montgomery in the head while he lay prone on the ground.

The camera emerges on the other side of the car, and Montgomery can be seen holding his left hand to his head.

"F--- you, I'm suing you," Montgomery said while on the ground.

"Good, I'm a cop," the man with the gun responds, later saying he's retired.

He contends the clubs were stolen from LaFortune Park Golf Course, claiming the alleged crime was caught on tape.

"Next time I'm going to shoot him right in the back of the f------ head," the armed man said.

A bystander responds, "No, you can't do that, he's not armed."

The video clip ends when a bystander asks the person filming to go into Golf Galaxy and have store officials come outside.

Police responded to Golf Galaxy at 9121 E. 71st St. on a report of a man pointing a deadly weapon. Officers believe the 59-year-old began visiting businesses that buy and sell golf clubs to try and find his set once he realized the clubs had been stolen.