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Duras, son of Ja'rod was a powerful and ambitious political figure in the Klingon Empire during the late 24th century. He and his family became notorious for dishonorable and sometimes treasonous tactics in order to accumulate and maintain power, which culminated in the Klingon Civil War of 2367-2368.
Duras was a member of the Klingon High Council when records were discovered implicating Duras' father as having betrayed the Khitomer colony to the Romulan Star Empire. With the help of Chancellor K'mpec, the blame was shifted to Mogh, one of Duras' long-standing enemies, and the father of Worf.
The death of K'mpec led to a struggle between Gowron and Duras for the position of Chancellor. During this struggle, Duras killed Ambassador K'Ehleyr. Her body was discovered by Worf, who beamed over to the IKS Vorn and killed Duras in a duel under Klingon law.