Richard Empson, born about 1434, was the son of Peter Empson (d.1473) and Elizabeth Joseph. John Stow claimed that his father was a sieve maker, but there is no evidence of this. His father, Peter Empson, held property at Towcester and Easton Neston in Northamptonshire.
Early in the reign of Henry VII he became associated with Edmund Dudley in carrying out the King’s rigorous and arbitrary system of taxation, and in consequence he became very unpopular. Retaining the royal favour, however, he was knighted at the creation of the future Henry VIII as Prince of Wales on 18 February 1504, and was soon High Steward of the University of Cambridge, and Chancellor of the Duchy of Lancaster, but his official career ended with Henry VII's death in April 1509.
Thrown into prison by order of the new King, Henry VIII, he was charged, like Dudley, with the crime of constructive treason, and was convicted at Northampton in October 1509. His attainder by Parliament followed, and he was beheaded on 17 August 1510. In 1512 his elder son, Thomas, was restored in blood by Act of Parliament.
Speaker of the House of Commons
Ancestry.com has this short biography: He was chancellor of the duchy of Lancaster. He was the infamous Sir Richard, minister of Henry VII, who became highly unpopular for carrying out the King's taxation program. He was a lawyer and member of Parliament for Northamptonshire in 1491 and speaker of the House of Commons. He was knighted in 1504. He was high steward of Cambridge University and chancellor of the duchy of Lancaster. His official career ended with Henry VII's death in April, 1509. He was imprisoned by Henry VIII, charged with "constructive treason," and convicted at Northampton in October, 1509. He was beheaded. 
M. M. Condon, ‘Empson, Sir Richard (c.1450–1510)’, Oxford Dictionary of National Biography, Oxford University Press, 2004; online edn, Sept 2015
Stephen, Leslie., Editor. Dictionary of National Biography (London, Smith, Elder & Co., 1888) Vol. XIII, page 364-365
Genealogical gleanings in England, database, InternetArchive, extracted from Henry F. Waters, book of the same name, (Boston, Massachusetts, New England Historical and Genealogical Society, 1901), Vol II, 845-867.
Hale, House and Related Families: Mainly of the Connecticut River Valley, database, FamilySearch.org: (accessed 13 Nov 2013), entry for Jane Empson, extracted from Donald Lines Jacobus and Edgar Francis Waterman, book of the same name (Baltimore, Massachusetts: Genealogical Publishing Co., Inc., 1978), 722