Prisoners Run Gangs, Plan Escapes, and Even Order Hits With Smuggled Cellphones

The presence of cell phones is changing the very meaning of imprisonment. Incarceration is supposed to isolate criminals, keeping them away from one another and the rest of us so they can't cause any more harm. But with a wireless handset, an inmate can slip through walls and locked doors at will and maintain a digital presence in the outside world.

Prisoners are using voice calls, text messages, email, and handheld Web browsers to taunt their victims, intimidate witnesses, run gangs, and organize escapes—including at least one incident in Tennessee in which a guard was killed.