AbstractA sample of 50 homicide defendants acquitted by reason of insanity (NGRI) was compared with a group of 50 defendants who were evaluated for insanity and found to be criminally responsible (CR). Significant differences were found between the two groups in terms of prior psychiatric and criminal histories and nature of the homicide (i.e., relationship to victim). The dispositions of those found NGRI were also examined on the above variables.