My partially thought out timeline using the the 2.6 days as a starting point.
I don't have a clear set date in my head as to the day Caylee died yet.
But with that said at some point Caylee after being dead for 2.6 days [60+ hours] was placed in the trunk directly on the carpet liner and left behind enough of the body causing a stain on the trunk liner or enclosed in something that leaked causing a small stain on the trunk liner. This spot after so many days of sitting in hot trunk started to smell, thus causing Casey to dump the car on the 27th of June.
Now that does not mean that the only time Caylee was in the trunk was just for a single period of time. It just means that the body or body fluids that leaked that the sample came from where at the stage of 2.6 days of decomp.
So pick a day for the death day. After about 60+ hours [2.6 days] of Caylee being dead, there was contamination to the trunk liner. If Caylee was placed back into the trunk then she had to be inside of something, that something had to be airtight and did not leak, keeping the trunk gaseous level at the 2.6 days time frame.
At this point with any new non-leaking container Caylee may have been in the trunk multiply times. At some point Caylee body was disposed. This could be before or after Casey dumped the car. The only thing about the car was that by the June 27th Casey could not stand the smell that came about because of the contact of the body or the leak from the body that had already happen after the 2.6 days [60+ hours].
Now Brian B. has the shovel day as either the 18th or the 19th of June in the afternoon for an hour. I will take the last time Caylee was seen alive the afternoon of June 16th about 1:00PM. We know that Chris S. said she was in a dark green jeep with NY plates but he cannot remember what day, 17th, 18th or 19th. I believe she may have been afraid to drive the car very much while she had a body in it. We also know that Brian B. said that Casey was out the house on June 20th with a man with dark hair that he had never seen before in a green truck. Tony admits that he went with Casey to the As to get gas and this was before the come get me at Amscot I ran out gas on June 27th but he is not sure of the date, he place it between 17th and 23rd .which if you take into account Caseys text to Amy H. about running out of gas two Fridays in a row make this date June 20th and that jives with Mr. B.s date that he saw the green truck.
From there we have a 4 day gap in time but we know on the June 24th Casey brought the gas cans back and would not let George go in the trunk.
Then we go to the 27th of June when she dumped the car.
Now we also have 3 possible sightings of Casey in the same time period of June 21st-27th or 28th.
We also have Casey using Cindys car but we still do not know when this was so it may not play into this time frame at all.
That is what we have to work with. Now we can attempt to look at cell phone records, tower pings and sightings of places and times that other people have placed Casey and try to expand on the 2.6 days and come up with a workable time frame.
Possible Time Frame #1
Using the 2.6 day calculation and placing importance on the shovel Caylee died the afternoon of the 16th and Casey put her in the trunk from then to the afternoon of the 19th. That would give you your 2.6 days gaseous decomp level and this can be supported by Casey showing up at the As on the 19th to borrowed the shovel from Brain B. Casey then placed Caylee into something, a pool chemical container, plastic tub or wrapped really good in plastic and then puts her back in the trunk.
Casey still needed gas for either the car, the trunk, or for something else by the 20th.I believe she may have been taking Tonys jeep out while he was in school when she was going to places like Chris S. house and wanted the gas in the cans for her car so she did not run the risk of a station attendant smelling her car if she stopped for gas at a gas station.
On the 24th either the trunk of her car was just starting to smell and she had this container with Caylee in the trunk and she did not want her father to close to see anything or smell anything.
On the 25th of June she text Amy H. about the smell as a cover in case someone did notice something but by the 27th just after getting Tony to pick her up at the Amscot lot she lets Amy H. know the mystery was solved hence she got rid of what was causing the smell the dead squirrel story.
She may have attempted to clean the trunk leaving behind some container of cleaning solution [chloroform ?] that GA said was in the trunk, the garbage bag with a box of leftover pizza and some papers. Once she was done with her attempt at cleaning and thought that the smell would go away or start to lessen she figured she was be better off leaving the car somewhere where no one would recognize it so she left it parked at the Amscot on the morning of the 27th. I do have to wonder if she was going to try and salvage the car because she was still looking for gas cans on the 30th or she realized she would be able to use Tonys jeep once he left on the 30th but she had to continue with the charade of needing the gas cans with Amy so to many questions would not be asked.
Before she was able to do retrieve the car it ended up being towed and that spot in the trunk just kept getting worse. She truly may have run out of gas because she had driven further than planned trying to find a location to dispose of Caylee.
Whichever the case if she went back and found the car already missing she now had another problem. Where did the car go? Casey's phone activity became more and more frenzied from that point until about 8:00PM on July 4th. We know Casey was avoiding her mother like the plague at this point. Casey was avoiding Lee as well. Cindy was making demands to see Caylee plus if Cindy was leaving messages to Casey and threatening her with car theft even before that first 911 call to get her to come home with Caylee Casey may have thought that Cindy knew more about the car then she really did.
I also believe that Casey may have not totally disposed of the body or was at least contemplating moving her at least through July 5th. The night sweats with Tony are very interesting. I have to wonder if they started after she disposed of Caylee and now she could no longer pretend to herself, at least in her own mind, that Caylee was with the nanny.
I have based this on what has been said in transcripts and taped interviews and have not taken into consideration if there is any deception in any of these peoples statements.