I also found a good debate about the broken window here:
http://www.injusticeinperugiaforum....blic-discussion-forum-2-8-2011-t747-2600.html
(On page 27, if the link does not take you to it)
in that discussion, they said many of the same things we said here in our theories about why the break in was real.
However, they added a theory, at least one of them did, that I hadn't considered before.
I remember when Allusunz or SMK said that RG might have thrown the rock to see if anyone were home.
This person says the same thing, but adds, while RG was waiting for a reaction, he heard MK at the gate or coming down the drive. Maybe she was calling her mom, and he interrupted her, claiming he'd just tried to visit downstairs, but no one was home, and he REALLY had to go to the bathroom.
So she didn't connect with her mom because he walked up to her. OR he could have waited for her to enter the house. She then was calling her mom when the doorbell rang. She hung up the phone to answer the door for RG.
Maybe he then went in the bathroom, did his thing, and she might have gotten scared, seeing the broken window. Who knows. It's not my theory. But it shows that other possibilities are there, thus reasonable doubt.