Guilty but mentally ill: the South Carolina experience.

Thirty of the first 45 individuals to receive guilty but mentally ill (GBMI) verdicts in South Carolina were interviewed using a structured interview schedule for diagnosis. The relationship of diagnosis to pretrial evaluation and posttrial conviction treatment are discussed. No person received GBMI in a jury trial. Suggestions to improve the operation of the GBMI verdict are made, as well as a brief review of these data with data from other states.