Yes, that is very open-minded of you, Otto. But I also think that, logically, some things are out of place in the scenario of Guede and the keys and the locking of doors. First of all, I have many issues with how the struggle is contained to Meredith's room in that scenario. So he breaks the window, there is a loud CRASH and then someone thud, thud, entering through the window. If Meredith is there, she would have heard something. Yet I don't believe she would have just sat silently in her room while Rudy rummaged through Filomena's room. If Meredith was not there, she would have seen him before reaching her bedroom once she came in, IMO. There would have been light on in Filomena's room (he rummaged through it), also light on in the bathroom if he was in the bathroom at the time she came in. Also maybe light on in kitchen area since he he might have helped himself to some food or drink in there. Many lights on when Meredith walks in. Wouldn't she have checked to see where Filomena might be, since the signs would be pointing to Filomena having come home early (Filomena bedroom light on and her bathroom light on)? How is it that she just walked all the way to her room and ignored all of those signs? If Rudy threated her with knife to walk to her room, the question is....why? Why her room?
Also with the keys and locking the doors, I see no evidence of Rudy searching for keys. How did he, first of all, know the front door was unlocked? How did he know exactly where her keys were located? Amanda and RS would have known more about the keys and the doors, and plus they could have covered their tracks. In lone-wolf, Rudy did not cover his tracks. What I see in the evidence is that he goes straight out the front door after the murder.