A Change of Mind

How did this 30-something guy go from charismatic to catatonic? A trip down memory lane will get you there.

When I first met Billy, he was sitting motionless in a wheelchair, gnawing on a bedsheet dangling from the side of his mouth. He did not reply to questions. When I asked him something, he would just stare at me with an ear-to-ear smile, as if he knew something no one else did. His muscles were stiff. Occasionally he would glance from side to side, chew on the sheet or pick at his arms with his fingernails. Two weeks ago, Billy went to the emergency department of another hospital with wet shoes ...

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