Patricide and overkill: a review of the literature and case report of a murder with Capgras delusion

Overkilling: A specific type of homicide - Constructing the definition: Perpetrator, weapon and circumstances

Overkilling in the Forensic Medicine is known as a specific type of homicide where the number of inflicted injuries greatly surpasses the number of fatal ones. Conducted research aimed to create a unified definition of the phenomenon and its classification criteria by analysing a vast majority of variables concerning its various characteristics. From the population of homicide victims autopsied in the authors' research facility a number of 167 cases were chosen consisting of both overkilling and other homicides. 70 cases were thoroughly analysed based on the completed court files, autopsy protocols and photographs. Second part of the research concerned the facts regarding the perpetrator, used weapon and the circumstances of the act. Conclusions of the conducted analysis allowed to add further characteristics to the overkilling definition: the perpetrators were almost exclusively men, around 35 of age, not related to the victim but might have been in a close relationship with them, often a conflicted one. They did not threaten the victim before the incident. Mostly perpetrators were not intoxicated, and they tried to cover up the homicide in various ways. Perpetrators of overkilling were in most cases mentally disturbed (and thus stated insane), had different levels of intelligence but also a low level of planning before the act - rarely taking actions as preparing the weapon in advance, choosing the scene or luring in the victim.

Matricide and psychiatric evaluation: An update

Matricide is an infrequent crime that has often raised to the suspicion that the offender could suffer from a pathological mental status. Although it is hard to establish a relationship between mental disorders and specific forms of homicide, several studies suggest that matricide offender frequently suffers from schizophrenia or other psychotic disorders. Aim of the study was to review the literature in order to explore epidemiologic and psychiatric characteristics of matricide offenders with a focus on the cause of death and crime circumstances. According to the PRISMA statement, 16 out of 225 studies were included. Main findings were the following: 80 victims were reported in total, killed by 81 offenders. In one case two brothers were responsible for the matricide. 81.5% of the offenders were young males. The most represented psychiatric pattern of the offenders was schizophrenia and psychotic disorders (43.2%). 6.2% of victims had also psychiatric disorders. Sharp force injuries were the first cause of death (55%), followed by blunt trauma (15%) and asphyxia (15%). In 12% of cases overkilling was also reported. 13.6% of offenders were considered not guilty for reason of insanity while 25.9% of the offenders had diminished criminal responsibility. A case study of a young homicide offender suffering from personality disorder is reported. In this case the victim also suffered from psychiatric disorders and an overkilling occurred as she was stabbed multiple times post-mortem. In a second case of matricide, the victim was dismembered and the human remains were concealed in several plastic bags.

From overkill to beheading: A case report of a schizophrenic matricide

Initial evidence exists on a subtype of matricide committed by subjects suffering from severe mental disorders. Matricide perpetrators often undergo a forensic psychiatric evaluation during the subsequent criminal trial because of supposed legal insanity. The few studies on matricide by mentally disordered perpetrators suggested a possible association between such extreme form of violence and schizophrenia spectrum disorders, especially in case of active delusions or hallucinations.

METHODS

we analyze a case of a young male with a recent diagnosis of psychotic disorder who committed matricide by inflicting multiple injuries and beheading. Data emerging from the forensic pathological analysis of the victim, as well as the forensic psychiatric analysis of the matricide perpetrator are discussed within an interdisciplinary perspective.

RESULTS

the autopsy revealed multiple stab wounds in the regions of the upper limbs, abdomen, chest, and neck, the latter determining beheading. The forensic psychiatric evaluation yielded a diagnosis of schizophrenia and clarified the causal role in the homicidal behavioral of active psychotic symptoms.

CONCLUSION

the specific type of delusional content, and perpetrator-victim relationship might contribute explaining a subtype of extremely violent homicide in recent onset schizophrenia.

Delusional misidentification syndrome and criminal acting out: A case report of maternal filicide

Delusional misidentification syndromes are associated with danger and may lead to homicide. Early assessment of the danger is a key part of the psychiatric examination. Compliance to treatment in psychosis is important to avoid the devastating consequences, for the perpetrator, the victim, and the community.