The Assassin (played by Martin Ferrero) was a marksman and a former NSA agent and Special Forces operative with experience in assassinations.
His record included operations in Granada and Zaire.
He later started working for the Syndicate. During this time, he learned about Gibson Praise. On his final operation in 1998, he attempted to kill Praise with a sniper rifle during an international chess tournament. The attempt failed, as Gibson was able to telepathically discern what was about to happen, and The Assassin was taken into police custody. Whilst in custody, he was shot through a slot in his cell door by his fellow Man in Black, the Black-Haired Man. (TXF: "The End")