Sounds like he was dismissive of the prisoners’ complaints:
“He appeared to think that the majority of patient inmates seeking care were faking, and thus he did very little to examine them or treat them,” Hepps said. “As a result of this behavior, Dr. Nuygen was referred to as `Dr. Death’ by inmates.” . . .
. . . Prisoners complained the doctor, who attended medical school in Vietnam, appeared to have difficulty understanding English. Also, because he suffered from Parkinson’s disease, Nuygen occasionally experienced tremors and difficulty with voluntary movements, according to his application for retirement benefits.
