[TankerKC]

"Surveillance video showed the men walking into the building with an item in their hands, but they did not have the item when they walked out of the courthouse, sheriff’s officials said. Investigators have not said whether that item was recovered or what it may be.”

Obviously it was an nicely wrapped fruit basket and a "COEXIST" bumper sticker.

[penelopesire]

My guess is they left some kind of tool(weapon) to be used later by the cell that might follow the initial foray. Just speculating.