Psychosis and homicide

Area of Science:

• Forensic Psychiatry
• Psychopathology
• Criminology

Background:

• Homicides by individuals with psychosis are rare but statistically significant.
• Public and legal interest in understanding this phenomenon is high.
• Existing research often focuses on perpetrators, with less attention to victimhood.

Purpose of the Study:

• To conduct a narrative synthesis of empirical literature on psychosis and homicide.
• To review research published between 2013 and 2017.
• To provide information for legal authorities and the public.

Main Methods:

• Systematic literature searches were performed.
• A narrative synthesis approach was employed.
• Empirical studies from 2013-2017 were included.

Main Results:

• Individuals with psychosis are five times more likely to be homicide victims.
• Psychotic symptoms, substance use, trauma, and weapon access are contributing factors.
• Service provision variations emerged as a clearer risk factor, but few homicide-specific advances were made.

Conclusions:

• Homicides by people with psychosis are very rare globally.
• Improving treatment for psychosis is the most promising approach, inferred from general violence reduction.
• Further research is needed to fully understand the epidemiology and specific factors involved.