Question: James Tyrrell was known for confessing to the murders of the only sons of which royal?
Context: Lieutenant-General James Tyrrell (c. 1674 – 30 August 1742) was an officer of the British Army and Member of Parliament. The Royal Tyrrell Museum is a Canadian tourist attraction and a centre of palaeontological research known for its collection of more than 130,000 fossils. "The Princes in the Tower" is an expression frequently used to refer to Edward V, King of England and Richard of Shrewsbury, Duke of York.  The two brothers were the only sons of Edward IV of England and Elizabeth Woodville surviving at the time of their father's death in 1483.  When they were 12 and 9 years old, respectively, they were lodged in the Tower of London by the man appointed to look after them, their uncle, the Lord Protector: Richard, Duke of Gloucester.  This was supposedly in preparation for Edward's forthcoming coronation as king.  However, Richard took the throne for himself and the boys disappeared. The murders of Chaney, Goodman, and Schwerner, also known as the Freedom Summer murders, the Mississippi civil rights workers' murders or the Mississippi Burning murders, involved three activists that were abducted and murdered in Neshoba County, Mississippi in June 1964 during the Civil Rights Movement.  The victims were Andrew Goodman and Michael "Mickey" Schwerner from New York City, and James Chaney from Meridian, Mississippi.  All three were associated with the Council of Federated Organizations (COFO) and its member organization the Congress of Racial Equality (CORE).  They had been working with the Freedom Summer campaign by attempting to register African Americans in Mississippi to vote.  This registration effort was a part of contesting over 70 years of laws and practices that supported a systematic policy of disenfranchisement of potential black voters by several southern states that began in 1890. James Tyrrell (May 5, 1642 – June 17, 1718) was an English author, Whig political philosopher, and historian. The Snowtown murders (also known as the bodies-in-barrels murders) were a series of murders committed by John Bunting, Robert Wagner, and James Vlassakis between August 1992 and May 1999, in South Australia.  A fourth person, Mark Haydon, was convicted for helping to dispose of the bodies.  The trial was one of the longest and most publicised in Australian legal history. Sir James Tyrrell (c. 1455 – 6 May 1502) was an English knight, a trusted servant of King Richard III of England.  He is known for allegedly confessing to the murders of the Princes in the Tower under Richard's orders.  William Shakespeare portrays Tyrrell as the man who organises the princes' murder in "Richard III". Sir Robert Filmer (c. 1588 – 26 May 1653) was an English political theorist who defended the divine right of kings.  His best known work, "Patriarcha", published posthumously in 1680, was the target of numerous Whig attempts at rebuttal, including Algernon Sidney's "Discourses Concerning Government", James Tyrrell's "Patriarcha Non Monarcha" and John Locke's "Two Treatises of Government".  Filmer also wrote critiques of Thomas Hobbes, John Milton, Hugo Grotius and Aristotle. Thomas James Tyrrell (14 April 1880 – 31 October 1942) was an Australian politician. John Acorn, also known as The Nature Nut, is a naturalist who is known for his inspiring personality and infectious love of nature.  He is a local Edmonton celebrity, combining folk music with educational lyrics about the natural world.  He is a lecturer at the University of Alberta, a research associate at the Royal Tyrrell Museum of Paleontology, and a research associate at the E.H. Strickland Entomology Museum.
Answer: Edward IV