Cartha "Deke" DeLoach (born 1920) was the deputy director of the Federal Bureau of Investigation (FBI) of the United States, and the third most senior official in charge of the FBI after J. Edgar Hoover.
DeLoach joined the FBI in 1942, and in 1965 Hoover promoted him to deputy director of the FBI. DeLoach was involved in the investigation of the assassination of John F. Kennedy and in a memo sent to Clyde Tolson, DeLoach claimed that President Johnson "felt the CIA had something to do with the plot" to kill President Kennedy.
In 1995 he wrote a book Hoover's FBI.[1]