This may sound like crazy talk but if it is this would be the thread to put it on.
It is easy to find roll on essential oils, it would be very easy to pop off the roller dump a bit out and refill with some poison, then let's say you have a brother that is a truck driver who would get tested for Illegal drugs if involved I a wreck, so you tell him hey this will help with your, headache, backaches get better sleep, or help you breathing. Then the Sister flies to Hawaii while the brother that knows no better uses this essential oil to help with the breathing problem he has been having there are ways that Alex could have been poisoned and it would not have shown up on the regular toxicology report.
I am not saying that AC was not involved in all of this evil doing but I also think LV And CD knew how much of a threat to their freedom he was once LE came looking for the kids.