Robert Deguerin

"Wars? (scoffs) Wars? John, John, John. I mean, wars, they come and go. What? We did 'Nam, we lost. We did the Gulf, we won, hey. But what changed, John? Nothing. Nothing ever does. The only difference is who gets rich and who gets dead. Personally, John.... I prefer rich., huh?"

- Deguerin justifying his actions after revealing his true colors to Kruger

Marshal Robert Deguerin is the main antagonist in the 1996 action thriller film Eraser.

He is portrayed by James Caan, who also plays Walter Hobbs.

Biography
Deguerin was originally the friend and mentor of John 'Eraser' Kruger (the hero of the film), and he works for the Federal Witness Security Protection Program (WITSEC) as a U.S. Marshal. They used to be close friends until the events of the film.

Capturing arms dealers and Cyrez
During the beginning of the film, Kruger and the FBI have caught wind of an arms sale formulated by a weapons company called Cyrez Corporation to sell electronic pulse rifle to Russian mobsters lead by the infamous terrorist Sergei Ivanovich Petrofsky, which may lead into a new era of world terrorism. After Cyrez Corporation executive Lee Cullen procure a disc containing the evidence following the suicide of Cyrez CEO William Donahue (who was a major player in the conspiracy), Kruger is assigned to protect her by having her to hide in New York City. He is then informed by Deguerin that a certain mole inside the WITSEC is targeting Cullen.

Reveal as The Mole and The Battle in The Port
During a mission to rescue another witness, Deguerin reveals himself as the mole, as he quietly kills the witness. During their trip back home, Deguerin murders WITSEC Deputy Monroe and shows his true colors to Kruger as he attempts to frame the latter for Monroe's death to facilitate his plans further. It is also revealed that Undersecretary of Defense Daniel Harper is the true mastermind of the arms sale and has assigned Deguerin to eliminate Cullen to cover their tracks. Kruger manages to escape, but Deguerin manages to capture Cullen and bring her to the docks, where he and his men are loading up the gun shipment into Petrofsky's freighter ship. Eventually, Kruger arrives to the rescue with the help from Johnny Castelone (who was previously a mob witness that Kruger saved earlier in the film) and his cousin Tony Two-Toes (who owns the docks). With the help from Johnny, Tony, and their associates, Kruger manages to take down Petrofsky and his men before saving Cullen and handing a critically wounded Deguerin to the authorities.

Death
The next day, a hearing takes place, but Deguerin and his two remaining conspirators (Harper and Morehart) manage to escape charges of treason, since a conviction and sentence for them will not be possible under civil law jurisdiction. As they leave in their limousine, Kruger fakes his and Lee's deaths by blowing up a vehicle in front of a large crowd of witnesses, including Deguerin himself. Deguerin believes the explosion had been set up by Harper, but Harper assumed vice versa. They both soon realize that no one within their inner circle had actually arranged it. The limousine then suddenly comes to an abrupt halt on a train crossing, and the doors lock themselves shut. The driver, who turns out to be Johnny himself in disguise, exits from the limo and runs off from the area. Deguerin anxiously looks around before receiving a phone call from Kruger, stating that he is about to be "erased". Looking out of the window, Deguerin, Harper, and Morehart see a freight train steadily approaching them, and Kruger and Johnny stand by to watch it smash into the limousine, finally killing Deguerin and his conspirators for good.