The Fourth Amendment and open carry of guns

On a midsummer evening, Shawn and Denise Northrup went for a neighborhood walk with their daughter, grandson, and dog. Apparently in a happy-go-lucky mood, Shawn wore a t-shirt reading, “This Is The Shirt I Wear When I Don’t Care.” Shawn carried a cell phone, which he holstered on his hip — next to a black semiautomatic handgun.