"We keep hearing about 4 went to sleep and 3 woke up, you do the math.
We keep hearing about 'inlaws before outlaws'."

This is usually right, am I right? Over 50% of the time? (I am perceiving those statements to mean look at the family first.) Maybe well over 50%? But I read you to say get past it; there are too many times when it is different. Anyway, there are too many times when it is different even if that's not what you are saying. Yet, imho, no one is right and no one is wrong and no one will know until the killer is identified.