Denver shooter murdered Trump supporter over being slapped
Frame #9 tells the tale. Fake Security is lifting his shirttail so he can produce his concealed firearm while his victim's hands are at his sides.
The two converge and the physicality begins when Fake Security lays his hands on Lee Keltner. In frame #1 his left hand on Keltner's chest and his right hand is grasping Keltner's vest. In response, Keltner strikes Fake Security with an open hand, knocking the cap off his head. Frame 8, Fake Security lays his weak-side hand on his shirttail, a preparatory move to producing a firearm in IWB carry. Keltner's hands are at his sides. Frame 9, Fake Security raises his shirttail and the back side of his strong-side hand is visible atop where the grip to a concealed pistol in AIWB carry would be. Keltner's hands remain at his sides.
Frame #9 shows Fake Security in the act of producing his concealed firearm. Keltner has yet given no indication that he intends using his OC spray. Fake Security clearly is under no threat to his life or of serious bodily injury.
Keltner only produced his OC spray in response to having a gun drawn on him.
Unfortunately, Colorado outlawed capital punishment earlier this year.