Intra-familiar homicides: From 2006 to 2021 in the judicial district of Milan

•Intimate partner violence remains the most common type of intra-familiar homicide.•Criminological risk factors are often involved in intrafamiliar homicides, especially for some subgroups (parricides).•Psychiatric anamnesis is the most relevant Risk factor, differently than among extrafamiliar murderers.•Methods of murder reflect the high level of impulsivity of these crimes.