I know, it's old

But what a story! Two police officers in Houston Texas were called to a nursing home because one of the patients was freaking out. The officers arrived and, well, I'll let the officer's own log say the rest:

22:45 – Me and my partner, Doug, arrived at the call. A man wielding a felt tipped writing instrument spotted me and began to advance toward me. As he was in a wheelchair and had only one arm, his advance took him in wide and irregular circles. But advance he did, holding his weapon between his teeth, much like in "Pirates of the Caribbean." I've seen that movie maybe a hundred times. I loved it!
Anyway -

Sensing the danger I ran directly into a corner so as to make it impossible for him to fake me out and get in behind me. Being in the corner did present a problem however, in that now I had no place else to run. So I asked the guy if the marker was dry erase or permanent but he wouldn't answer me. Fear for the cleanliness of me and my partner gripped my throat. We had never trained for being chased by a man with only one arm, one leg and who was confined to a wheelchair.

My alarm grew when I saw with my own eyes, the label on the pen. It was indeed, permanent marker.

“Doug,” I cried out. “He's going to get this crap all over my hands, and maybe even my uniform. Quick. Do something.”

So my partner pulled his Glock 9mm and killed him. One shot. Not like those New York guys who take like fifty shots to kill one perp and a bunch of collaterals as well. So, that's about it.

It all happened so fast we still had time to get something to eat before the doughnut shop closed.