False, the danger wasn't known until I identify the person in my yard as an armed fugitive. When I approach I'm just thinking 'who the hell is in my boat?'.
Note the laws above are based on my belief that I'm in danger, or my belief that I'm defending others. I'm advocating responsible civilians taking action to protect themselves and each other. Otherwise we will always only act after an atrocity has already been committed.
If a civilian with a concealed carry permit happened to see Adam Lanza approaching an elementary school armed with a rifle and 2 pistols, are you telling me that person should not intervene?
I also did a ninja edit!