I always thought that it was Gowron, too. It was hinted in the scene when he comes to speak to K'Ehleyr and unsuccessfully tries to bribe her. When she refuses his offer with contempt ("You speak like a Ferengi!"), he gets angry and says that K'mpec was also stubborn and didn't listen, and now he's dead. K'Ehleyr herself later says at a meeting with Picard, Riker and Worf, "He implied I would end up like K'mpec if I didn't cooperate".
Gowron always seemed shifty and slimy, he wasn't a "good guy" but just the "lesser of the two evils" compared to Duras. But the problem is, when you have to choose the lesser of the two evils, you still end up with an evil.
Gowron always seemed shifty and slimy, he wasn't a "good guy" but just the "lesser of the two evils" compared to Duras. But the problem is, when you have to choose the lesser of the two evils, you still end up with an evil.