Henry Lee Lucas, also known as The Confession Killer, was an American convicted murderer. Lucas was convicted of murdering his mother in 1960 and two others in 1983. He rose to infamy as a claimed serial killer while incarcerated for these crimes when he falsely confessed to approximately six hundred other murders to Texas Rangers and other law enforcement officials. Many unsolved cases were closed based on the confessions and the murders officially attributed to Lucas. Lucas was convicted of murdering eleven people and condemned to death for a single case with a then-unidentified victim, later identified as Debra Jackson.

A serial killer is a person who murders three or more people, with the killings taking place over a significant period of time between them. The serial killers' psychological gratification is the motivation for the killings, and many serial murders involve sexual contact with the victims at different points during the murder process. The Federal Bureau of Investigation (FBI) states that the motives of serial killers can include anger, thrill-seeking, financial gain, and attention seeking, and killings may be executed as such. The victims tend to have things in common such as, demographic profile, appearance, gender or race. The FBI will focus on particular patterns that the serial killers follow throughout their murders. They will then use on the patterns they find for key clues into finding the killer along with their motives. 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.