Inside the prison system's illicit digital world

On January 2, 2014, a vendor truck approached the entrance to the Sierra Conservation Center, a mid-sized state prison nestled in the sleepy foothills town of Jamestown, California. Guards were stationed at the entrance, along with Duchess, a female Belgian Malinois who works in the K-9 contraband unit of the California Department of Corrections and Rehabilitation. As the driver waited to be let in, Duchess began to sniff around the rear of the truck. Suddenly, she began whining excitedly.

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