Kreighton Sul was fighting the CIS on Callus Prime when Order 66 was issued. Kreighton sensed anger in Clone Commander Neu, who told Kreighton about Order 66. Commander Neu suggested that Kreighton should go into hiding and Kreighton agreed and thanked the Commander. Commander Neu told High Command that Kreighton had been killed.
Kreighton Sul was rescued by Jance from the 326th Division. As a way to thank Jance, Kreighton took him to a remote planet named Tatooine, there Jance was introduced to Jedi Master Obi-Wan Kenobi. Obi-Wan told Jance and Kreighton that Anakin was dead, Jance was not convinced and went to Naboo to form a rebellion. The Queen of Naboo had ordered her guard to arrest the Jedi, Jance and Kreighton escaped, but became separated. Kreighton's fate remains a mystery but it is likely that he was killed by Darth Vader as his Lightsaber was clipped to Vader's belt when he confronted Jance Byington.