A Florida middle school principal said he “did something dumb” after he was arrested at Walmart for trying a shoplifting tactic he claims his friends told him would work. Bok Academy North Principal Gregory Lewis was at a Winter Haven Walmart in Polk County on Saturday afternoon when an asset protection officer observed him “skip scanning” at the self-checkout, WFLA reported. The middle school principal, who admitted to the crime, told a Winter Haven police officer during his arrest that his friends had told him about the shoplifting tactic and that he wanted to try it out for himself.