Homicide is frequently associated with mental illness and suicide. The present study is an investigation of homicide incidents in Iceland during the past 80 years. Of 45 homicide incidents, 1/3 of the perpetrators were either psychotic, mentally subnormal or committed suicide. Over 60% of the offenders and 50% of the victims were under the influence of alcohol at the material time. The findings are generally consistent with those of previous psychiatric studies of homicide. (SIEC)