That's the point absolut- he WITHELD the gas cans in the trunk when it was found and that he put them back.. Thus why LE did not know about them or collect them until the day after the FBI meeting.. To me, if he's lieing at the onset, you can't believe anything he said
I think George didn't know Caylee was missing at the time. He could have withheld the information because he made his point with Casey....that from now on, these pranks were not going to be tolerated.