Jacen Yar was a pursuer of wanted individuals and a native of Kel Dor, operating within the bounty hunter profession.
Following the devastation of the Almas Academy, Yar spearheaded a team of bounty hunters to the planet Almas. Their mission was to apprehend any surviving Jedi. During this endeavor, they crossed paths with a salvage crew known as the Stalfonauts, resulting in a battle that led to the demise of everyone involved.
Sometime after this event, two Force-sensitive parasitic entities, controlled by both Inquisitor Valin Draco and the Gatekeeper guarding Darth Rivan's holocron, seized the deceased bodies. This created the appearance of animated corpses. These "zombies" were then deployed against individuals sympathetic to the Jedi cause who were attempting to recover the Qornah Holocron.