A home invasion can be a simple knock at the door by a individual that causes no red flag or alarms to go off.
Happened here a few years back when folks were getting robbed by a guy dressed in a TU Electric uniform.
When I got mugged I was at the gas pump in broad daylight with people all around me.
The guy was dressed in jeans and a Polo type shirt and stuck a 38 in my ribs.
trust me it happens FAST!!!!
Last year two men attempted to rob me at the gas pump but changed their minds when I side my shirt up and kicked the saftey off and placed my hand over the butt of my 40cal.
The only thing they did to arouse my suspicion was they did not approach their gas tank but tried to flank both side of the pump.