No, they killed your brother...—Shawn, to Kiro, Sift Renegade
Shawn was one of the members of the Yakuza. He was killed in Sift Renegade.
Sift Heads 4: Vinnie's Paradise[]
Shawn appears (without being named) for the first time in Sift Heads 4, in the mission called Shadow of the Traditions. The player has to tell between him, Shigeru and Kienji in order to kill the correct target, as they all look the same in this game.
Sift Renegade[]
Kiro receives a phone call from the Triad Chief that the Yakuza are going to lose one of their brothers soon. Believing it means the Triads are going to kill one of his friends, he resolves to prevent it. When he arrives at the scene, he finds a severely wounded Shawn who tells him that "they" have killed his brother. Before he can clarify who exactly killed Kienji, he is killed by a Triad member. Kiro decides to take vengeance on Triads, unaware that they are not the ones behind his brother's death.
Sift Renegade 3: Defiance[]
As Kienji and Shigeru are looking for Kiro, they encounter Shawn. He joins them but asks Kienji what exactly is going on. Kienji reveals that there is a traitor among the Yakuza, but before he can give out any more details, he is shot and killed by Vinnie.