So were they left in another brigades truck, which means they should be owning up to the lost property if your name is in it...or left at the scene & stolen.
Or maybe it went for a walk because it was lonely...
send a search team
I have left pens, gloves, bum bags, etc at either the incident scene or other vehicles, when I was completing storm damage tasking many years ago....very embarrassing when they are presented back to you at next training in front of everyone.
I think the Unit in those days even created a 'lost property' box after weekend exercises...