He arrived at the Guyans' flat and forced his way in. After Cattanagh screamed "You can't come in here!", Thomas Guyan jumped to his feet to see what the problem was. As he opened the kitchen door, he was met by Burnett, carrying the gun. A shot rang out and Guyan fell dead, having been shot in the face at close range. Burnett then took Margaret out of the flat at gun point; on the way down the stairs, he threatened a young boy from a neighbouring flat.