On 11/26/2017 Kansas City (Kansas) Police Captain Michael Howell was off-duty and shopping at a Costco in Lenexa when armed gunman Ronald Hunt arrived, announced that he was an off-duty U.S. Marshal and there to kill people. Captain Howell stalked Hunt while in the store and then confronted him at gunpoint. Hunt refused to follow Captain Howell’s commands to drop the gun and not move, turned towards Captain Howell and pointed his revolver at him before Captain Howell fatally shot him. A Costco surveillance video is included in this interview with Captain Howell.

Episode 430
https://www.youtube.com/watch?v=sgh6DUA2FMM

https://www.policeone.com/officer-shootings/articles/467800006-Video-shows-off-duty-cop-tracking-down-gunman-at-Kan-Costco/

http://www.policemag.com/channel/patrol/news/2017/12/15/kansas-chief-credits-off-duty-officer-with-saving-lives-by-shooting-gunman-inside-costco.aspx

https://www.policeone.com/officer-shootings/articles/467869006-Police-captain-recalls-shooting-of-Kan-Costco-gunman/