Researchers have demonstrated that prolonged solitary confinement causes a persistent and heightened state of anxiety and nervousness, headaches, insomnia, lethargy or chronic tiredness, nightmares, heart palpitations, and fear of impending nervous breakdowns. Other documented effects include obsessive ruminations, confused thought processes, an oversensitivity to stimuli, irrational anger, social withdrawal, hallucinations, violent fantasies, emotional flatness, mood swings, chronic depression, feelings of overall deterioration, as well as suicidal ideation.”

Over the next decade, Powers, by any rational accounting, lost his mind. He cut off both earlobes, chewed off a finger, sliced through his Achilles’ tendon, pushed staples into his face and forehead, swallowed a toothbrush and then tried to cut open his abdomen to retrieve it and injected what he considered “a pretty fair amount of bacteria-laden fluid” into his brain cavity after smashing a hole in his forehead. In 2005, after slicing open his scrotum and removing a testicle, Powers was sent to the medical center for federal prisoners in Springfield, Mo., for treatment, where a psychiatrist determined he was “not in need of inpatient psychiatric treatment or psychotropic medication” and that his behavior “was secondary to his antisocial disorder.” When he was returned to Springfield four years later, after slashing his wrists and writing “American Gulag” in blood on his bedsheets, the doctor wrote, “Considerations that (Powers) has some form of psychosis, thought disorder or mental illness are unfounded.”

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On the morning of May 1, 2010, Vega was found dead in his cell. He had hanged himself with a bedsheet. After Vega’s death, Powers shaved his head and began decorating his body with what he would describe as his “Avatar stripes,” a reference to the striped blue aliens in the James Cameron movie. Using a razor blade to make tiny cuts in his skin and then rubbing carbon-paper dust into the wounds, Powers tattooed spiky black slashes along his arms, legs, neck, skull, under his eyes and around his Adam’s apple. A photograph from 2011 presents an astounding transformation: The smirking, shaggy-haired young bank robber who entered the federal prison system in 1990 no longer existed, and the man who replaced him looked like something out of a nightmare.”