The butcher of Montellian Serat

The butcher of Montellian Serat was a devaronian during the empire, he was so termed after he slaughtered a lot of rebel prisoners on Devaron, he was not entirely to blame as he was just following orders from the empire, they did not tell him to execute them but his exact orders were: Take no prisoners with you and leave no men behind to guard them. He was later hunted down by Boba fett who killed him. The butcher was also a great fan of music and collected some of the galaxy's most valuable music recordings.

Sources: Tales from the Mois Eisley Cantina The Bounty hunter Chronicles