Homicide
Homicide occurs when one human being causes the death of another human being. Homicides can be divided into many overlapping types, including murder, manslaughter, justifiable homicide, killing in war, euthanasia, and execution, depending on the circumstances of the death. These different types of homicides are often treated very differently in human societies; some are considered crimes, while others are permitted or even ordered by the legal system.
Criminal homicide
Criminal homicide takes many forms including accidental or purposeful murder. The crime committed in a criminal homicide is determined by the mental state of the committing person and the extent of the crime. Murder, for example, is usually an intentional crime. In many cases, homicide may in fact lead to life in prison and or even capital punishment, but if the defendant in a capital case is sufficiently mentally disabled in the United States he or she cannot be executed. Instead, the individual is placed under the category of "insane".