Characteristics of Three Forensic Veterinary Cases Involving Pet Deaths in Domestic Murder-Suicide Incidents

Murder-suicide, also referred to as homicide-suicide, results in multiple casualties. The victims are typically human, and cases involving the inclusion of pets, sometimes termed “murder-suicide-peticide”, have been rarely reported worldwide. The aim of this study is to present and examine the characteristics of three forensic veterinary cases in which pets were found dead alongside human victims in suspected domestic murder-suicide incidents in Japan. We analyzed information provided by the police agency about the owners, families, and the animals, as well as necropsy findings of three cases. In all three cases, it was determined that both the human and animal victims died from the same cause, suggesting a tendency for perpetrators to kill pets using the same methods as those used on human victims. Murder-suicide is regarded as the most extreme form of domestic violence and abuse. Ongoing interdisciplinary research is essential for developing effective intervention strategies to protect vulnerable individuals, both human and non-human, within the household.