Krassus

Krassus was an Orion Orion slaver. In 2372, he intended to sell an Orion slave girl named Zina to Barsamis, but took a liking to her and decided to keep her for himself. When Barsamis protested, Krassus killed him with a knife.

In 2373, Krassus gave Zina to Mackenzie Calhoun to satisfy a gambling debt. He later tried to ambush Calhoun with his knife, but Calhoun shot him with his blaster, critically injuring him, then used his knife to slash his throat, killing him. 

Krassus died owing money to Krut, who got Calhoun's description from Zina and began searching for him to get his revenge.