That cart of carry on luggage may well have not been put with the checked luggage. I saw the cart being rolled up a ramp into the plane & I saw it off loaded. There weren't any carts with checked baggage off loaded at that time. I was the first to grab my carry on, it was at the top of the cart. I could physically feel my laptop and my large silver necklace. The only possible way to steal from that bag was in flight. The police/detectives concurred. They delay caused at TSA by my husbands 2 artificial knees precipitated the whole event and lead to us being the last to board.