Flinn Boster served as an Officer within the Imperial forces during the era of the Galactic Civil War. After the Battle of Yavin, Lieutenant Boster fulfilled the role of a security officer stationed at the Imperial Research and Prison Facility situated on Dathomir. At this location, Imperial scientists were covertly engaged in risky scientific endeavors, with the goal of transforming the terrifying Blackwing virus into a bioweapon. While serving in the facility, in the year 1 ABY, Lieutenant Flinn Boster was on-site when an incident occurred, resulting in the escape of the virus from its contained environment. The virus resulted in the death of the majority of individuals within the area, transforming them into undead beings.
The character of Flinn Boster received a reference within the video game Star Wars Galaxies in 2003, a massively multiplayer online roleplaying game that was created by Sony Online Entertainment and distributed by LucasArts, before its servers were shut down on December 15, 2011. The inclusion of Flinn Boster's name in the game happened through "Game Update 14," which was made available on October 12, 2009.