Females in the United States accounts for 12% - 15% of ALL murders. Interestingly, women account for roughly the same percentage of serial murders. Most kill for gain - wives, Boarding-Home owners, etc, Caretaker killers - nurses and childcare workers. Family Annihilators - protecting their children Lust murder - extremely rare, usually at the  urging  of a man      Female serial murderers generally do not stalk or torture their victims and usually use poison to kill. They generally kill close to home or workplace rather than showing mobility found in many male killers. The median age at arrest is 37.9 years, with a range of 40 years  (19-59). The average age when kills begin is 32.9 years. (18-53) Everyday Murder Revenge Murder Revenge is defined as the act of committing a harmful action against a person or group in response to a grievance, be it real or perceived.  It is used to punish a wrong by going outside the law. •Victim did something to the suspect or his family •Suspect sees victim as the cause of some trouble or issue •The need to right a wrong •Killing of parents Anger Murder Anger murder is an act of killing based on high emotions of anger. Such as in a passion murder, domestic murder, or an immediate wrong that has resulted in intense anger. May be part of a revenge murder if planned. Usually not a planned event but rather an act of passion or circumstances. Concealment of Other Crime These murders are committed out of a need to conceal another crime such as; Rape or Sexual Assault - Theft or Burglary - Eliminating a Witness These are usually planned or at least determined to be a part of the crime event. Such as child assault/murder Infanticide The crime of killing a child within a year of birth. Usually for very select reasons: •Concealment of the birth •No longer wants the child •To save the child from danger or Hell