I knocked on Xao’s door. He greeted me in a flat voice, a bespectacled man who looked younger than his 33 years. I tried to picture him as he was in the ER all those years ago: This is a 24-year-old Chinese male University School of Medicine,brought in by the police after he went on a rampage with a meat cleaver.
He is stained in blood and is belligerent and aggressive. . . .
The ER physician had obviously...