 In May of this year, Alexander attended the Stirling parliament, and sat on the jury of 21 knights and peers which ordered the execution of Murdoch ("Muireadhach"), Duke of Albany, along with his son Alexander and his ally Donnchadh, Earl of Lennox.However, the destruction of the Albany Stewarts removed the main reason for the co-operation between the King and the Lord of the Isles.It is possible that, as Michael Brown believes, James acknowledged Alexander's control of the earldom of Ross as a reward for his support against Albany, as in 1426 Alexander used the style "Master of the Earldom of Ross".