Star Trek: Deep Space Nine: Warpath

They were created to be killing machines. Highly intelligent resourceful and deceptively complex the JemHadar are a species engineered for war and programmed at the genetic level for one purpose: to fight until death as soldiers of the sprawling stellar empire known as the Dominion. No JemHadar has ever lived thirty years and not even their masters the shape-shifting Founders know what such a creature is capable of becoming were it to be freed of its servitude. One Founder however has dared to wonder. Appointed by Odo himself to learn peaceful coexistence aboard Deep Space 9 ™ Taranatar an Honored Elder among the JemHadar had for months been a staunch if conflicted ally to the crew of the station ever struggling to understand the mission on which he was sent . . . until something went horrifically wrong. Consumed by self-doubt and an ever-growing rage Taranatar has lashed out against those he was sworn to aid. While Captain Kira Nerys and Lieutenant Ro Laren both lie near death aboard DS9 their assailant has taken a hostage and fled into Cardassian space pursued by Commander Elias Vaughn on the U.S.S. Defiant. But as the hunt unfolds Taranatars true objective becomes increasingly less certain as the rogue JemHadar leads the Defiant to a discovery even more shocking than his crime.