Capital punishment is a legal penalty under the United States federal government criminal justice system. It can be imposed for treason, espionage, murder, large-scale drug trafficking, or attempted murder of a witness, juror, or court officer in certain cases. The federal government imposes and carries out a small minority of the death sentences in the U.S., with the majority being applied by state governments. The Federal Bureau of Prisons (BOP) manages the housing and execution of federal death row prisoners.