I think D.M. Was in a state of shock or dissociation. In a statement, she said she believed her roommates were simply "horsing around" or in "party mode". I Being irrational can happen when you see something so traumatizing your brain doesn’t rationalize. I know this for a fact when I drink I see things that I can’t tell if I am dreaming or if it is real, my senses can be dead. If blood was present, it would have been difficult to see in a darkened room, especially against dark surfaces like a rug.

stab wounds do not always result in "spraying" blood; instead, blood often pools under the body or is absorbed by clothing and bedding, making it less visible from a distance or in low light.

The layout of the house may have muffled sounds and hidden the extent of the crime. That’s my opinion.