Contract killing (also known as murder-for-hire) is a form of murder or assassination in which one party hires another party to kill a targeted person or people. It involves an illegal agreement which includes some form of compensation, monetary or otherwise.
A male contract killer is colloquially known as a hitman.
A serial killer (also called a serial murderer) is an individual who murders three or more people, with the killings taking place over a period of more than one month in three or more separate events. The Federal Bureau of Investigation (FBI) states that the motives of serial killers can include anger, thrill-seeking, attention seeking, and financial gain, and killings may be executed as such. The victims tend to have things in common, such as demographic profile, appearance, gender, or race. As a group, serial killers suffer from a variety of personality disorders. They are often not adjudicated as insane under the law. Although a serial killer is a distinct classification that differs from that of a mass murderer, spree killer, or contract killer, there are overlaps between them.
View the full Wikipedia page for Serial killerOrganised Crime and Gangs in Australia refers to the activities of various groups of crime families, organised crime syndicates or underworld activities including drug trafficking, contract killing, racketeering and other crimes in Australia.
View the full Wikipedia page for Organised crime in Australia