A Necktie for Gifford — Ethan Flagg

The bounty hunter known as 'Montero' learns that his brother is to be hanged for murder in the New Mexico town of Alamagordo. A single clue left by the dead man - the two letters 'MA' - ensures that a guilty verdict is inevitable. The two brothers had parted some years before under hostile circumstances, but Montero is convinced that Mace Gifford would never shoot a man in the back. He plans an ingenious escape, but saving his brother's neck is only the beginning - he has to find the real killer...