This successful first act was denied a sequel when in 1189 Conchobar was killed in Clanconway. The assassins were Manus mac Flann Ua Finaghty, Aodh mac Brian (his first cousin), Muircheartach mac Cathal mac Dermot mac Tadhg, and Giolla na Naomh Ua Mulvihill of the Tuathas. His murderers were described as
a party of his own people and tribes, though the real culprit seems to have been that other contender for the kingship of Connaucht, Connor mac Cormac. In the same sentence, he was described as the
King of all Connacht, both English and Irish. The annalist further stated: ''Alas for the party who plotted this conspiracy against the life of the heir presumptive to the throne of Ireland! To him the greater part of Leth-Mhogha had submitted as king. Donnell O'Brien had gone to his house at
Dunloe, where he was entertained for a week; and Ó Conor gave him sixty cows out of every
cantred in Connacht, and ten articles ornamented with gold; but Ó Brien did not accept of any of these, save one goblet, which had once been the property of Dermot Ó Brien, his own grandfather. Rory Mac Donslevy, King of Ulidia, had gone to his house. Mac Carthy, King of Desmond, was in his house, and Ó Conor gave him a great stipend, namely, five horses out of every cantred in Connacht. Melaghlin Beg, king of Tara, was in his house and took away a large stipend; and Ó Rourke had gone to his house, and also carried with him a great stipend''. ==Successors and descendants==