As Constable of the Tower of London, Brackenbury inevitably figures in any account of the fate of Richard III's nephews, the Princes in the Tower.
For example, in Thomas More's version of the life of Richard III, More says that after the coronation on 6 July 1483 and while on his way to Gloucester, Richard sent John Green to Brackenbury with written orders for Brackenbury to kill the princes.