During Riv Shiel's early career as a spacer, he was mistaken by Imperialstormtroopers for the wanted Shistavanen rebel, Lak Sivrak. The soldiers attacked Shiel, who killed them. His act of self-defense earned Shiel a death mark that he would carry for the rest of his life.
When Wedge Antilles reformed Rogue Squadron in 6 ABY, Shiel applied for membership in the elite unit. His simulator scores were good enough to earn him a place on the roster and he was paired with Gavin Darklighter.
Shiel was killed during a raid on three bacta tankers when the Victory II-class Star DestroyerCorrupter, commanded by CaptainAit Convarion, ambushed the squadron. Convarion opened fire three seconds after reversion to real space, destroying the tanker that Gavin Darklighter, Shiel and two Twi'lekDeath Seed pilots were escorting, killing Riv and the Twi'leks and damaging Gavin's X-wing.