Fraj T'lin was an Arpor-Lan individual of the male gender, who held the rank of Lieutenant within the ranks of the Alliance to Restore the Republic.
Sometime after the destruction of the first Death Star in 0 ABY, the Rebel pilot Luke Skywalker narrowly avoided being killed in an assassination plot orchestrated by X-7, an Imperial assassin who had infiltrated the Rebel forces. X-7 planted explosives on Skywalker's speeder bike, but the pilot managed to escape unharmed just before the explosion.
The Alliance assigned T'lin the responsibility of looking into the attempted murder, and he deployed specially modified patrol droids that were designed to locate even the smallest amounts of detonite. One of these droids discovered two kilograms of detonite located in the temporary living space of Han Solo, the smuggler, inside the Rebel base. T'lin questioned Solo concerning this discovery, and after the smuggler claimed innocence, the lieutenant placed him under arrest. Following this, T'lin informed Princess Leia Organa about what he had found.