I know this sounds nuts, but I bet "they" planned to kill the owner(s) and setup shop for a while. One trick to pulling off audacious crimes is act like you're supposed to be there and know what you're doing? I don't like the looks of her at all.
This is one for the kooky bin, that's for sure.
We walked into a house in Cocoa Beach FL one Sunday morning. It had a For Sale sign and it looked abandoned and we peeked in the windows and walked around the yard,,and since it looked empty, we decided to see if it was, so we turned the knob on the door and it opened and we took two or three steps inside and realized someone's clothes were laying on the floor.......it wasn't abandoned!
We turned around and got the hell out of there and were terrified we were going to get arrested,,,,it was an honest mistake. This woman, has got to be mentally ill.
Well, I'll be damned. I think you're right.
Let's see: the owner lives alone and apparently has no immediate neighbors, so no reason for anyone to be suspicious.
The owner comes home, walks in and says, "What the hell..." and you just plug her with the gun. Presto, change-o, you have a place to stay.
Getting rid of the body...well, she may have had a plan for that, and if so we'll find out soon enough.