Question is, who put the bag of trash in the car.
A) Casey was carrying it around with her? She was being a good housekeeper and taking out the trash? They ate pizza, she did laundry, bagged the trash and tossed it in her car to haul off.... she just forgot. Doesn't seem likely.
B) Casey tossed it in there to mask the smell of a decomposing body? She could have used the Arm & Hammer in an attempt to clean the car? Partially likely.
Either of the above mentioned possibilities will mean the trash was in the car, the Anthony's knew what the smell was, but they removed the bag of trash. Is that tampering?
C) Cindy or George put the trash in the car in an attempt to mask the smell, then took it out after, ?? a few hours? It wasn't that long from them getting the car from the tow yard, to LE being called. Only one day before it was picked up.
D) Cindy and George only CLAIM there was trash in the car in an attempt to excuse away the smell.
Either way, none of these possibilities look good. It still points to someone covering up a smell of decomposition.
JMO..... Everything at Cindy & George's house appears to be pretty neat,
doesn't seem like they would have old trash (w/maggots) laying around, just in case they needed it.