This is 'married w/ a spouse' patterns, but these are college teenagers during the weekend. They were out until 2am and so sleeping in until 12pm (when the bodies were found) is par for the course.I can understand being a hard sleeper
But you notice patterns within a few weeks of living with someone.
Making coffee at 7 am. Bathroom rotation. Tv. Cars in driveway.etc
And the front door locked with a code…..
It sounds like someone was already in the house
We'll see how things unfold over time, but just as it seems implausible for it to be someone from outside the house, it seems implausible that someone would commit an gruesome crime, then decide to go back to sleep in the house as if nothing happened