We get to see first hand what the sun will do to various items. On fishing rods it fades everything to a yellowish tint. Royal blue become turquoise,and so on. The stickers on the van had to have been placed there recently. Find out who did it most likely not Caesar Altieri and you have a good start on who is involved in all this.
Knowing Fla. as I do those stickers could not have been on the van longer than a few weeks.
It's a huge clue and the FBI probably realize that and is why they covered it up almost immediately.
If they were "stickers" at all. They appear to be a collection of logos and memes, resized and printed on a single panel to perfectly fit the windows, and with no gaps or seams.
Pretty professional look for a crazy RAT-hack that can't even spell or build a credible bomb.