ive made the same point multiple times. Everyone is going to deep in opposite directions that don't make sense. This crime was committed by someone familiar with the family, someone local. Possibly more than one person of course.
I could right now commit this same crime easily in the same type of rural area over night if I am familiar with the properties and the victims. Easily.
*Who would know timing wise to wait until DR was off of her unexpected 11pm double?
I also stated previously that that the hardest person to get evidence on is the person who's DNA would naturally be all over all 4 locations due to them being familiar and personable with the victims.
Her working late may not have changed anything if the plan was 4:00 am. for the murders. Also not knowing the times of death could change things greatly.