I don't think these murders had anything to do with chemicals and drugs. I think the suspect went to the house with a weapon with the intent to kill. That is what I conclude based on the fact that the victims have been declared dead and charges of premeditated murder. The presence of the medical examiner, and information from police, imply that there was blood at the scene, that there was a violent struggle, and that at least one person was in "medical distress". This strikes me as a straight forward blitz attack where one after the other, the victims were violently attacked (not from a distance with a gun). The victims were removed from the crime scene not of their own volition ... dragged. They were put in the back of a pick up truck, taken from the scene, and they are now where ever the suspect put them. He may have used lye to increase decomposition, perhaps not ... that remains to be seen.