Answer the following question: Information:  - Murder is the unlawful killing of another human without justification or valid excuse, especially the unlawful killing of another human being with malice aforethought. This state of mind may, depending upon the jurisdiction, distinguish murder from other forms of unlawful homicide, such as manslaughter. Manslaughter is a killing committed in the absence of "malice", brought about by reasonable provocation, or diminished capacity. "Involuntary" manslaughter, where it is recognized, is a killing that lacks all but the most attenuated guilty intent ("mens rea"), recklessness.  - William Palmer ( 6 August 1824 -- 14 June 1856 ) , also known as the Rugeley Poisoner or the Prince of Poisoners , was an English doctor found guilty of murder in one of the most notorious cases of the 19th century . Charles Dickens called Palmer `` the greatest villain that ever stood in the Old Bailey '' . Palmer was convicted for the 1855 murder of his friend John Cook , and was executed in public by hanging the following year . He had poisoned Cook with strychnine , and was suspected of poisoning several other people including his brother and his mother - in - law , as well as four of his children who died of `` convulsions '' before their first birthdays . Palmer made large sums of money from the deaths of his wife and brother after collecting on life insurance , and by defrauding his wealthy mother out of thousands of pounds , all of which he lost through gambling on horses .  - Charles John Huffam Dickens (7 February 1812  9 June 1870) was an English writer and social critic. He created some of the world's best-known fictional characters and is regarded by many as the greatest novelist of the Victorian era. His works enjoyed unprecedented popularity during his lifetime, and by the twentieth century critics and scholars had recognised him as a literary genius. His novels and short stories enjoy lasting popularity.  - Homicide refers to one human being killing another. Homicides can be divided into many overlapping types, including murder, manslaughter, justifiable homicide, killing in war, euthanasia, and capital punishment and abortion, 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.    What entity does 'william palmer ' has the relation 'penalty' with?
Answer:
capital punishment