080119 432 Tran Walker has been found guilty of the stabbing deaths of his ex-girlfriend and a friend, according to the Sioux City Journal. District Judge Tod Deck announced his verdict this afternoon in Woodbury County District Court after weighing the evidence for two months. Nineteen-year-old Walker of Sioux City was charged with two counts of first-degree murder for the Jan. 28, 2018, stabbing deaths of 17-year-old Paiten Sullivan, and 18-year-old Felipe Negron Jr., 18, both of Sioux City.