The broken window..
What was the point of it?? It was a second floor window, so unless he brought a ladder with him, it does suggest the break-in was staged. If Rudy acted alone, why would he bother doing that?
shareThere is proof that the break in could have been carried out without a ladder and he did have a history of breaking and entering through windows of properties
http://www.amandaknoxcase.com/rudy-guedes-break-in/