Sneaking contraband into prisons has always been a problem for jailers and inmates alike. In the Johnny Cash diddy, “I’ve Got Stripes,” Cash sings about his mother coming to see him in prison on a Monday only to be caught with a file on a Tuesday. But since that song was released in 1959, not only has the coveted contraband changed, but also the methods of delivery. As Kerri Jo Hickman understands, modern problems require modern solutions.