A Canadian detainee rejected his US military attorneys Monday at the first session of the Guantanamo war crimes tribunals called under President Barack Obama, complicating his high-profile case and the administration's timeline for closing the prison. Omar Khadr, who is charged with killing an American soldier in Afghanistan, said he lost trust in his Pentagon-appointed lawyers after witnessing an ugly internal squabble that prompted the pretrial hearing. "How am I supposed to trust them if they are accusing each other?" said Khadr, 22, who had a full black beard and wore a white prison jumpsuit. The judge set another hearing next month in a long-running drama that suggests Obama's plan to close the offshore prison by January is overly optimistic.