If they explain to me that they are investigating a checker I'd be happy to oblige. If they simply believe that I'm a thief, I will not. Simple as that. They need to arrest me to see my bags or receipt and if they do I will sue. I have a problem with insinuations that I'm a thief. If they want to stop theft, they should stop thieves ... I am not a thief, so they are not reducing theft by stopping me.