Slave I was a modified Firespray-31-class patrol and attack craft used by the infamous bounty hunter Jango Fett before the Clone Wars. Jango outfitted the craft with a number of weapons, including laser cannons, projectile launchers, and seismic charges. While under Jango's ownership, the ship was in a dogfight over Geonosis with the Jedi starfighter piloted by Obi-Wan Kenobi.
After Jango's death during the Battle of Geonosis, the craft came into the possession of his son, Boba Fett, who used it throughout his own bounty hunting career. After several failed attempts to kill Jedi Master Mace Windu, Fett, his ally turned mentor Aurra Sing, and Bossk traveled to the planet Florrum to meet with Sing's friend, spice pirate Hondo Ohnaka. After the arrival of the Jedi Ahsoka Tano and Plo Koon, Fett and Bossk were captured. When Sing tried to escape on Slave I, Tano leaped onto the ships hull and sliced off a wing with her lightsaber. After this, Sing lost control of the ship and it crashed. Ohnaka took ownership of Slave I for a short period of time, before it returned to Boba's ownership near the end of the Clone Wars. The ship became well-known to the galaxy's fugitives, who recognized it as the ship owned by one of the galaxy's deadliest bounty hunters. During the Galactic Civil War, Boba used Slave I to transport a carbon-frozen Han Solo from Cloud City to Jabba the Hutt on Tatooine. Originally, it had a blue base instead of the dark red, this was then changed when it came into Ohnaka's possession.