If RG, a known burglar, had a flashlight with him why would he need to turn on any lights? How many times has it been known that a person breaks into a house at night and turns the lights on in a room? How many times does a person not only turn a light on in a room but leave the light on in a room when they leave the room?
The larger bathroom is not easily seen from the living room/kitchen area. There are two doors for that bathroom. One door where the outer sink and washer/dryer are and then another door where the toilet, bidet, tub/shower are. How is it known that both or even one of those doors was open when RG was in the bathroom?
Do we know that Filomena's bedroom door was open when Meredith came home? Was it pulled closed some or even shut all the way by RG?
It is possible and probable that RG chocked Meredith first until she was unconscious and then stabbed her. I will include a video that has an expert stating how this is possible and in his opinion how it occured.
Since RG was a burglar, then one would conclude that the crime was originally to steal money or something that would be easy for him alone to carry out of the cottage. However once Meredith came home, someone that could ID him, it then led to her murder.
MOO
ETA: I can't get the video to upload correctly however the video can be seen on this link under "An expert for the defense demonstrates that Meredith was murdered by a single attacker. This video include an interview with Madison Paxton"
http://www.injusticeinperugia.org/videos.html