Or maybe the dog was traumatized and hiding under the victim's bed while the crime was being committed.
Either way, I don't think we know what the dog did or where he was before or after the crime. Unless the dog can talk, I don't see how it is relevant to the murders.
If Murphy was loose in house, he could have gotten blood evidence on himself. YET, LE took him to shelter. LE could have misspoken and it was morning not evening when dog was found.
I was focused on dog, because I was wondering about logistics of the crime. HOW did perp avoid leaving blood evidence between the bedrooms. Did he clean up in each room, or after. How did he clean up, how long did it take. Did Murphy carry evidence on his paws? Fur? Probably not, or I think LE would have kept him longer.
If perp did not clean up very well, did two remaining roommates see anything at all on the floor. Is this why LE wont release 911 calls?
Unanswerable questions at this time...just curious.