摘要: Background Suicide with accompanying homicide is frightening and ill understood. Aims To raise professional awareness of its complexities difficulties identify areas for developing research. Method A Crime in Mind seminar was held London December 2018, four expert presentations discussion. This paper draws on that supplementary literature. Findings Homicide/suicide very difficult to predict thus prevent. Victims perpetrators may have a dependency relationship. Better training, especially general practitioners, increase the likelihood detecting signs despair delusional ideas. Psychiatrists should be more alert fixed delusions homicidal thoughts. Individual assessment management alone unlikely sufficient. Public health strategies are likely important too. Weapons control vital. Employers people great personal responsibility special access potentially lethal tools, such as airline pilots, perhaps clinicians, regular, compulsory, mental checks. Conclusions Six points clinical importance emerged, including lowering threshold diagnosing disorder establishment anti-violence clinics.