Walter Stewart Earl of Atholl
a Scottish nobleman, the son of Robert II of Scotland.
Stewart was an enthusiastic advocate of the ransom and return to Scotland of the future king in exile, James I, in 1424. In 1425 he served as a member of the jury of 21 which tried and executed his nephew Murdoch Stewart, 2nd Duke of Albany. Eventually however Atholl turned against the King and conspired in his assassination in 1437. He was tried for murder and was executed after 3 days of gruesome torture