The letter to the editor “Attempted familicídio: case report of forensic psychiatric” exam brings up a subject that, although low in incidence, features a high-impact, not only by mobilizing public opinion, but also for its high degree of unpredictability. There are few studies on the subject, most trying to find theoretical explanations for the crime, with no consensus in the literature, or to set up an epidemiological profile of the perpetrator, where a pattern can be extracted, possibly allowing the development of strategies to prevent future crimes.