I think the trunk was a "moving temporary coffin" for this baby girl's body (sorry so graphic). All indications to me point to child dying at the house (laundry bag, hefty bag, duct tape, blanket, no shoes on Caylee) and being "packaged" at the house for the ride in the trunk. 2 days later smell is overwhelming and KC realizes there's a basketball size stain in the trunk - no longer is the "packaging" containing fluids. Also, remember for drug tests to show positive results in the hair - it must have had time to grow through the hair. A one time recent event will probably not show up as the hair has not had time to grow . JMO