 Tyrrell was arrested by Henry VII's forces in 1502 for supporting another Yorkist claimant to the throne.Shortly before his execution, Tyrrell is said by Thomas More to have admitted, under torture, to having murdered the princes at the behest of Richard III.The only record of this is the writing of Thomas More, who wrote that, during his examination, Tyrrell made his confession as to the murders, saying that Richard III ordered their deaths.