noun
forensic psychiatrist; psychiatric expert witness; court-appointed psychiatrist
A psychiatrist who evaluates mental state for legal purposes, often in criminal cases.
裁判で精神鑑定医が被告の責任能力について証言した。
At the trial, the forensic psychiatrist testified about the defendant's criminal responsibility.
精神科医 is a general psychiatrist who treats patients, while 精神鑑定医 specifically evaluates mental state for legal proceedings.
Compound of 精神 (mind, mental) + 鑑定 (expert evaluation, appraisal) + 医 (doctor).