Question: John du Pont served 30 years in prison for the murder of which Olympic wrestler?

Context articles: Lammot du Pont Copeland
Charles I. du Pont
John du Pont
Foxcatcher
USS Du Pont (DD-941)
Victor Marie du Pont
Dave Schultz (wrestling)
Éleuthère Irénée du Pont
A. Felix du Pont
Francis Gurney du Pont

Lammot du Pont Copeland (May 19, 1905 at Christiana Hundred, Delaware – July 1, 1983 at Mt. Cuba Center, Greenville, Delaware) son of Charles Copeland (March 30, 1867 in Englewood, New Jersey – February 3, 1944) and Louisa d'Andelot du Pont (January 25, 1868 in New Castle County, Delaware – August 10, 1926).
 They were married February 16, 1904 at St. Amour in Wilmington, Delaware.
 He was the great-great-grandson of DuPont-founder Eleuthère Irénée du Pont, and the company’s 11th president from 1962 to 1967.
 He married Pamela Cunningham (May 5, 1906 – January 25, 2001) on February 1, 1930 at Litchfield, Connecticut.
 She was the daughter of Mr. & Mrs. Seymour Cunningham of Litchfield.
 Lammot and Pamela had three children: Bouchaine Vineyards winery owner Gerret van Sweringen Copeland, Lammot du Pont Copeland, Jr., and daughter Louisa du Pont Copeland, who married James Biddle.
Charles Irénée du Pont (March 29, 1797 – January 31, 1869) was an American manufacturer and politician, and an early member of the prominent du Pont family business.
 He was a nephew of Eleuthère Irénée du Pont, the founder of the E. I. du Pont de Nemours and Company, and a member of the Delaware General Assembly.
John Eleuthère du Pont (November 22, 1938 – December 9, 2010) was an American philanthropist and heir to the Du Pont family fortune, he had been a published ornithologist, philatelist, philanthropist, conchologist, sports enthusiast, self-styled wrestling coach.
 He died in prison while serving a sentence of 30 years in prison for the murder of Dave Schultz.
Foxcatcher is a 2014 American true crime sports drama film produced and directed by Bennett Miller.
 Written by E. Max Frye and Dan Futterman, the film stars Steve Carell, Channing Tatum, and Mark Ruffalo.
 The film's plot is loosely based on the events surrounding multimillionaire Du Pont family heir and wrestling enthusiast John du Pont's 1986 recruitment of 1984 U.S. Olympic gold medalist brothers Mark (Freestyle Wrestling - 82 kg) and Dave Schultz (Freestyle Wrestling - 74 kg) to help coach U.S. wrestlers for participation in national, world, and Olympic competition, and the subsequent murder of Dave by John du Pont in January 1996.
 Although the film's action is largely set at Foxcatcher Farm, du Pont's now-broken-up 800-acre suburban Philadelphia estate, the majority of the movie was filmed in the Pittsburgh metropolitan area.
USS "Du Pont" (DD-941), named for Rear Admiral Samuel Francis Du Pont USN (1809–1866), was a "Forrest Sherman"-class destroyer built by the Bath Iron Works Corporation at Bath in Maine and launched by Mrs. H. B. Du Pont, great-great-grandniece of Rear Admiral Du Pont; and commissioned 1 July 1957, Commander W. J. Maddocks in command.
Victor Marie du Pont de Nemours (October 1, 1767 – January 30, 1827) was a French American diplomat, politician and businessman.
 He was a member of the Delaware General Assembly, the founder of the Du Pont, Bauduy & Co., wool manufacturers, and brother of Éleuthère Irénée du Pont, the founder of the E.I. du Pont de Nemours Company.
David Leslie "Dave" Schultz (June 6, 1959 – January 26, 1996) was an American Olympic and world champion freestyle wrestler, a seven-time World and Olympic medalist.
 He coached individuals and teams at the college level and also privately.
 He was shot and killed by John Eleuthère du Pont, a millionaire philanthropist who sponsored the private Foxcatcher wrestling team at an amateur sports center, known as Foxcatcher Farm, he set up on his estate in Pennsylvania.
Éleuthère Irénée du Pont de Nemours (24 June 1771 – 31 October 1834), known as Irénée du Pont, or E. I. du Pont, was a French-American chemist and industrialist who founded the gunpowder manufacturer E. I. du Pont de Nemours and Company.
 His descendants, the Du Pont family, have been one of America's richest and most prominent families since the 19th century, with generations of influential businessmen, politicians and philanthropists.
Alexis Felix du Pont Sr. (April 14, 1879 – June 29, 1948) was a member of the American du Pont family who served as a vice president and director of E. I. du Pont de Nemours & Co. and a philanthropist who helped found St. Andrew's School in Middletown, Delaware.
Francis Gurney du Pont (May 27, 1850 – November 7, 1904) was the creator of smokeless gunpowder.
 Du Pont served as superintendent of the Upper and Lower Hagley Yards and later as general manager of Carney's Point, New Jersey, in 1891.
 His invention was assisted by cousin Pierre S. du Pont.
 His son was E. Paul du Pont, founder of Du Pont Motors.