Lord Richard Grey (d. 1483), the younger son of Edward Grey, was made a knight of the Bath on Whitsunday, 1475 (Book of Knights, p. 4). After the death of Edward IV he and his uncle Anthony Woodville, earl Rivers, had for a time charge of the young king, but when conducting him to London for his coronation, they were arrested at Northampton on 30 April 1483 by Richard, duke of Gloucester, who charged them with having estranged from him the affection of his nephew. Grey and Rivers were sent to prison at Pontefract, where in June they were seized by Sir Richard Ratcliffe, and beheaded without any form of trial. According to Sir T. More this happened about the same time as the execution of Lord Hastings, which took place on 13 June; Rivers, however, was not executed till later, for his will is dated 23 June, but he refers to Richard Grey as already dead, and directs that he should be buried by his side in Pontefract Church (Excerpta Historica, p. 246).
Dictionary of National Biography, 1885-1900, Volume 23
Grey, John (1432-1461) by Charles Lethbridge Kingsford