I read the story and got many things out of it. First how fast the officer got stabbed with the ice pick and in the chest twice (in seconds). It also tells me that we also have seconds to react to an attack. In another post we talked about knife attacks and one thing we all learned is in any SHTF we can not get to close to anyone because someone can stab you many times in seconds.
The other thing that I got if that shooting someone or killing someone will stay with you for ever. All of us will have to defend our families in a SHTF and we will all be put in a situation were in seconds we have to shot someone or more then one.
It will do be easy to take a life.