We don't know if the Amscot has security video showing Casey leaving the car in the lot after business hours on June 26th.
We do have Tony's statement (to LE? or to the press?) that he picked Casey up at the car on Friday June 27th.
If the impound lot can prove that the car was not moved from the time it was towed on June 30th (or if it was boxed in by other vehicles and couldn't have been moved), there's a very short window of time in which someone could have gone to the Amscot lot and deposited Caylee's body in the trunk.
Would that scenario pass the common sense/reasonable doubt smell test with a jury?
Lordy, I don't think so.
I don't think so either. Besides the defense has to have some basis in fact. The person would have had to have access to the trunk since I don't think it was broken into. Also, the person would have to taken the extreme risk in removing the body. And if someone was going to set Casey up, why move the body at all.