The real question I have is why the security was basically AWOL that night. I believe it was about 8 years ago they put in camera's and security from the Washington DC capital police that protect house members. The camera's recorded the break in, but nobody was watching the cameras supposedly.
So it appears that the best case is the police were incompetent and reduced security dramatically when the Speaker isn't home, but didn't protect her family.
The other option is that security was reduced by plan to let person break into the house on purpose.
Either situation doesn't give me a good feeling about what happened, and makes me wonder if we will ever find out the truth.