Career
He was executed after the Second Battle of Street Albans. The de Criol, Kyriel or Kyriell family built up a position in Kent, where they fortified Westenhanger Castle, from the middle of the 14th century. Kyriell served under Henry V of England in Normandy, and in 1436 held the fortress at Le Crotoy in Picardy.
He served under John, Lord Talbot at this period, around Rouen, and was created knight-banneret by 1443.
He led the English forces in the 1450 French victory, the Battle of Formigny. There he showed himself a Yorkist, by his opposition to Edmund Beaufort, 2nd Duke of Somerset.
He was openly a Yorkist commander by 1460, as heavy fighting began in the Wars of the Roses. At the Second Battle of Street Albans, eight days later, Kyriell was on the losing side captured while guarding the king, Henry VI of England, who was a Yorkist prisoner.
Margaret of Anjou had Edward of Westminster, Prince of Wales pronounce the fate of the Yorkist guard, and they were beheaded.