The death penalty, also known as capital punishment is when a government or state executes someone, usually but not always because they have committed a serious crime.
The most common crimes that were punishable by the death penalty are; torture before murder, murder of children and murder of police officers.
Executions took peculiar forms. The most used and memorable form of execution in California was that of the gas chamber which was modified in San Quentin State Prison, altering the gas chamber to enable the properties of the lethal injection.
The lethal injection is seen as the most humane and sanitary way of execution in the US, as it neglects pain and suffering. The Lethal injection is relatively recent, as it was only introduced in 1993.