From a post on my personal Facebook page.
I avoid Stop and Robs in general. One of my men was murdered in one while working an evening part time. It scarred me forever. The hardest thing I ever had to do in the Army was sit with his mother while he was dying in the hospital and listen to her tell me how that POS had killed her son. It was heart breaking.
Many years ago, Evan Marshall, a long time Detroit policeman, wrote a column in Combat Handguns magazine. One month he described his plan if he was caught up in a convenience store robbery.
As long as all they’re doing is robbing the till (register), I’m going to act like a CPA from Akron and be a good witness. But if they start searching people, making people get down on their knees, or herding people into a back room, my wife knows to get away from me because I’m going to start shooting.
My soldier’s murder was captured on grainy surveillance video. He did everything the robbers wanted and opened the safe. They made him get down on his knees and then one of them shot him in the head. He survived for two weeks in hospital before he passed away.
When I went to visit him, his mother took me into an unoccupied waiting room and told me the story of what happened. I will never forget it as long as I live. Evan’s words came to mind and I decided then and there it would never happen to me.
This is Boyd’s Process; know ahead of time what your capabilities are and what you are going to do when the time comes. Then execute your plan without hesitation.
“He threatened me, and said he was gonna slice my head off, and that’s when I tried to call the police. He started throwing things at me, came behind the counter. I tried to run off, but he grabbed his hands around my neck, and pushed me out of the counter space, and that’s when I pulled out my gun and I shot him.”
https://okcfox.com/news/local/7-eleven-clerk-fired-after-shooting-attacker-in-self-defense
tacticalprofessor 
Marshall’s quote has always been my plan. Try to stay out of the way and not incite. But the survival rate for actions past quickly robbing the register dwindles fast.
I even tell my children, do not become a hostage. Chances go down so fast, take the risk of being shot running away over compliance, and nothing but prayer.
Thanks Claude. Good info as always.