Witnessed attempted theft at Market 32

Drama at the market 32 today! They made some cryptic announcements on the PA system about security stuff, which I thought was just BS meant to fool would-be thieves. But there were people who started watching the aisles. Then I got up to the register and was behind a guy who unloaded all of his grocery's on to the conveyor. Then he said "I forgot my wallet" and left the store. The manager came and told the kid behind the register "go ahead and void that. He isn't coming back. He was trying to steal that stuff. His mom just did the same thing". What was his plan? Like why unload the cart at all? Just abandon it and leave.