Ja'rod

Ja'rod was a male Klingon who lived in the 24th century. Ja'rod was the father of Duras, Lursa, and B'Etor. (TNG episode Redemption).

By 2346, Ja'rod was assigend to the outpost of Khitomer. Mogh, Son of Worf, who was Ja'rod's greatest rival soon followed Ja'rod to Khitomer. In 2246 Ja'rod provided the shield codes to the Romulan attack force, enabling them to lower the outpost's shields and devastate the outpost. Ja'rod died when he was shot by Mogh's wife Kassin. (TLE novel The Art of the Impossible

For many years, the truth behind the Khitomer massacre was unknown by the Klingons until they captured a Romulan ship with files which revealed whose shield codes were sent to the Romulans - which were Ja'rod's codes. The Klingon High Council had the files altered to blame Mogh as they feared that if the truth was known that it would split the Empire and plunge the Empire into civil war. At first, Mogh's son Worf challenged the council, but later backed down and accepted discommendation. It was not until after the Klingon Civil War of 2366-2367 that the truth was finally known. (TNG episodes Sins of the Father and Redemption, Parts I & II).