Not in that state, according to law (unless you're driving, of course). Besides, he's the one who called the cops, and the cop searched his bag and found no shoplifted merchandise. The employees were the suspicious persons, as they were in the middle of committing the crime that caused a citizen to dial 911. They should have been arrested, not him. He does deserve a "royal jackass" award though.
He was stopped outside the store on suspicion. If he was in the store, he has plausible deniabilty.
He was stopped inside the store after checking out, but left. There wasn't necessarily suspicion of shoplifting initially, as he came from the register, and these stores have a habit of doing random checks.
LOL this bozo should be charged for falsely calling 911 if nothing else. Your cries the CC employees were at fault instead are hilarious, as well as a perfect insight to how a liberal mind works.