Thornton Duggan

Background

Thornton Duggan is a Texan member of the Duggan Crime Family, nephew of the family's head and industrialist Avery Duggan, and older brother of the late oil baron Mason Duggan. Less dangerous than his uncle but just as ambitious, he is introduced in The Diamond Casino & Resort update (July 23, 2019) and later serves as the main antagonist, never seen on screen, of The Diamond Casino Heist.

Role in GTA Online

Thornton first appears in Casino - Strong Arm Tactics, sitting in on Avery's meeting with Tao Cheng, his translator, Agatha Baker and the protagonist. Avery sends him off to show Ms. Baker expansion plans shortly before the meeting collapses into a shootout.

In Casino - Bad Beat he returns, claiming he has fallen out with his uncle but still wants the casino, and earns some trust by warning the group that The Professionals, hired by Avery, are coming to attack it. In the final mission, Casino - Cashing Out, he offers a way to save the deal: he will buy the casino for the asking price plus twenty percent if they kill Avery, which would give Thornton his inheritance and full control of the family. Having gained ownership, he becomes the target of The Diamond Casino Heist, which Georgina Cheng organizes to punish the Duggans.

Personality

Thornton presents himself as a reasonable peacemaker, but he is an opportunist willing to have his own uncle killed for money and power.

Trivia

• His main affiliation is Agatha Baker, the casino manager he first courts with a peace offering.