Do we even know for sure Murphy was found inside the house? A statement that appears in all the Moscow police press releases says: " On the night of the incident, officers located a dog at the residence."One thought I haven't heard theorized re: Murphy is that he could have been put into the 3rd floor bathroom by K, especially if he had any recent "accidents" in the bedroom. It would be easy to throw down a pee pad in the shower and enclose him there for the night. We know from LE that he was found in a room where the murders did not occur. To me, it makes a lot more sense for him to be in a small room like a bathroom or closet than in a bedroom. I do wonder if the perp fed Murphy something drugged to cause him to sleep for hours.
It seems odd to me that they didn't find the dog until that night and the way it is phrased to say "officers located a dog AT the residence" not found a dog IN the residence. Maybe he escaped through the open front door? Or maybe when Kaylee let him out the night before, he never came back? Could the perp have interacted with the dog when it was outside? Did K and M call Jack because the dog didn't come back? Maybe they were afraid to search because they saw something outside? It opens up a lot of questions if Murphy wasn't found in the house I think.