At Conceal Carry Class they stress that when a store's Rep asks you to leave you are to do so, signs or no signs. Supposed to avoid confrontations.
Agreed. As soon as an agent of the owner speaks for him in asking you to leave, every moment of delay thereafter is a moment of trespass. He was guilty of harmless trespass, however, and nothing more. Not a capital offense. Not by a long shot.
And he wouldn't have been shot if he didn't go for his gun or point it at the officer.
