Sean Richard Sellers (May 18, 1969 – February 4, 1999) was an American murderer, one of 22 persons in the United States since the reinstatement of the death penalty in 1976 to be executed for a crime committed while under the age of 18, and the only one to have been executed for crime committed under the age of 17. His case drew worldwide attention due to his age as well as his jailhouse conversion to Christianity and his claim that demonic possession made him innocent of his crimes.

On March 5, 1986, Sellers killed his mother and stepfather, Vonda and Lee Bellofatto, while they were asleep in the bedroom of their Oklahoma City home. Wearing only underwear to limit blood spatter on himself, he first shot his step-father. The shot awoke his mother, whom he shot in the face. Sellers tried to disguise his guilt by arranging the crime scene to look as if an intruder had committed the killings.

Sellers also later confessed to the 1985 killing of Robert Paul Bower, a thirty-two-year-old Circle K convenience store clerk who had refused to sell him beer

At his trial, Sellers claimed he was a practicing Satanist at the time of the murders and that demonic possession (by the demon "Ezurate") caused him to murder his victims. In later documents, he claimed to have read The Satanic Bible by Anton Lavey "hundreds of times" between the ages of 15 and 16, when the crimes were committed. His attorneys also argued Sellers was addicted to the game Dungeons & Dragons, although Sellers would later write that the game had no part in his crimes and that "using my past as a common example of the effects of the game is either irrational or fanatical."

The jury refused to consider either claim, and Sellers was found guilty of multiple homicides and sentenced to death in 1986. At the time, Oklahoma law did not give juries the option of giving a life sentence without the possibility of parole (that choice became available in 1987).

Sellers was executed by lethal injection on February 4, 1999 at the Oklahoma State Penitentiary in McAlester, Oklahoma. 

One page (front and back) handwritten letter. Letter is general content and is signed 'Sean' and is dated September 15, 1997. Letter has no rips or tears and would be considered to be in good condition for being almost 25 years old - slight stiffness and discoloration due to its age. Envelope is NOT INCLUDED. Items and letters from Sellers are extremely hard to come by and are highly sought after in the hobby.