Question: What American prison inmate shot and killed John Lennon?

Context articles: Prison of Secrets
Paul Greenwood (money manager)
Cell dog
I Just Shot John Lennon
Derek Percy
James Scott (boxer)
Larry Jay Levine
Mark David Chapman
Birdman of Alcatraz (film)
Shonelle Jackson

Prison of Secrets is a 1997 American television film directed by Fred Gerber.
 The film is based on a true story and focuses on a female prison inmate who fights for women's rights while still in jail.
Paul Greenwood (born 1947) is an American money manager who was convicted of securities fraud with business partner Stephen Walsh.
 He was arrested with Walsh on February 24, 2009.
 The total fraud is estimated at between $550 million and $670 million.
 On July 28, 2010, he pleaded guilty to securities fraud.
 On December 3, 2014 he was sentenced to a decade in Federal prison by Manhattan U.S. District Judge Miriam Goldman Cedarbaum, who told him "many people today lost many thousands of dollars as a result of your fraud."
 Greenwood is a Federal prison inmate (# 61989-054), incarcerated at the Federal medium security prison in Butner, NC.
 His scheduled release date is 11/30/2023.
A cell dog is a rescue dog that is being housed with a prison inmate, with the goal of improving the lives of both.
 These dogs are placed through a collaboration between the prison and an animal shelter.
 The inmates attempt to make the dog "adoptable" through obedience training, learning the skills of dog-training in the process.
 Additionally, both dog and inmate gain companionship and socialization they might not otherwise enjoy due to their circumstances, forming a kind of animal-assisted therapy for the inmates through human–canine bonding.
"I Just Shot John Lennon" is a song from The Cranberries' album "To the Faithful Departed".
 It is a narrative of the events of the night of December 8, 1980, the night that musician John Lennon was murdered by Mark David Chapman in front of The Dakota in New York City.
 It is one of many tributes to Lennon, and also one of many other songs to recall the events of the night.
 After the narrative, there is commentary: "What a sad, and sorry and sickening sight".
Derek Ernest Percy (15 September, 1948, Strathfield, New South Wales - 23 July 2013 St. Vincent's Hospital, Melbourne) was an Australian child killer, linked to the deaths of nine children in the 1960s.
 He was found not guilty, by reason of insanity, of the murder of Yvonne Tuohy, and he was suspected in the double murder of Marianne Schmidt and Christine Sharrock and the triple murder of the Beaumont siblings, as well as the individual murders of Allen Redston, Linda Stilwell, and Simon Brook.
 After being arrested for the murder of 12-year-old Yvonne Tuohy in 1969, Percy stated that he could not remember whether or not he had committed any further crimes.
 Percy died from Lung Cancer in St Vincents Hospital, Melbourne on 23 July 2013, aged 64, without admitting to any of the crimes, at the time he was the longest serving prison inmate in Australia, some 44 years.
 In October 2014, after his death, he was formally ruled to have abducted and killed seven-year-old Linda Stilwell in 1968.
James Scott (born October 17, 1947) is an American former boxer and former prison inmate.
 He is best known for having become a contender in the World Boxing Association's light heavyweight division while incarcerated at Rahway State Prison in Avenel, New Jersey.
Larry Jay Levine (born July 1, 1961) is an American federal prison consultant.
 In April 2007, Larry Levine founded American Prison Consultants, a legal services firm that provides information and federal criminal litigation assistance to lawyers, and offenders going through criminal proceedings in U.S. District Court, who are about to enter the federal prison system.
 American Prison Consultants also operates under the synonymous name of Wall Street Prison Consultants.
Mark David Chapman (born May 10, 1955) is an American prison inmate who murdered John Lennon outside the Dakota apartment building in Manhattan in New York City on December 8, 1980.
 Chapman fired five times at Lennon, hitting him four times in the back.
 Chapman later remained at the crime scene and began reading J. D. Salinger's novel "The Catcher in the Rye" until the police arrived and arrested him.
 He repeatedly said that the novel was his statement.
Birdman of Alcatraz is a 1962 biographical drama film starring Burt Lancaster and directed by John Frankenheimer.
 It is a largely fictionalized version of the life of Robert Stroud, a federal prison inmate known as the "Birdman of Alcatraz" because of his life with birds.
 In spite of the title, much of the action is set at Leavenworth Prison, where Stroud was jailed with his birds.
 When moved to Alcatraz he was not allowed to keep any pets.
Shonelle Jackson is an American prison inmate currently on Alabama's death row.
 In 1997, at the age of 19, Jackson was arrested for the murder of Lefrick Moore that occurred during the commission of a robbery in Montgomery, Alabama.
 During the investigation, Jackson initially told detectives that he did not know the three other co-defendants, and was not present at the time of the murder.
 Montgomery Police Detective Andrew Signore, having learned from the other defendants that just prior to the murder Jackson had purchased a soft drink from a local drive-thru, informed him that his fingerprints were found on a Dairy Queen cup located inside the victim's stolen vehicle.
 At the time, Detective Signore did not know if any latent fingerprints had been discovered on the cup, but advanced this deception in an effort to encourage Jackson to admit to knowing the other defendants, and being present with them at some point during the night of the murder.
 Jackson then admitted that he knew the other defendants and had been with them earlier in the day prior to the murder.
 He then asked to amend his statement a third time to admit he was present at the time of the murder and was armed with a .380 handgun.
 Following a jury trial, he was found guilty of capital murder.
 In sentencing Jackson, the presiding judge, William Gordon, overrode the jury's unanimous recommendation of a life sentence, and instead imposed the death sentence.
 Judicial override of a jury's sentencing recommendation is permitted under Alabama law.
 Later, in a sworn deposition, juror Jan Burkes expressed uncertainty that Jackson, one of four defendants charged with this crime, fired the shot that killed Moore.