SEOUL, South Korea (AP) — South Korea's ousted conservative PresidentYoon Suk Yeolwas indicted Saturday on additional criminal charges related to his ill-fated imposition of martial law, about three months after he was formallythrown out of office. Yoon's additional indictments mean he will remain in jail for up to six months as hefaces a trialat the Seoul Central District Court on his Dec. 3 martial law declaration that plunged South Korea into huge political turmoil.Yoon was sent back to prisonlast week after the Seoul courtapproved his arrest warrantrequested by a team of investigators headed by independent counsel Cho Eun-suk. Cho's team indicted Yoon on abuse of power that obstructed the rights of some of his Cabinet members. The charge was imposed because Yoon summoned only select Cabinet members to approve his emergency martial law when South Korean law requires approval of all Cabinet members for such a measure, Park Ji-young, a senior investigator at Cho's team, told a briefing. Park said Yoon was also charged with fabricating an official document in an attempt to satisfy a formal requirement for a martial law declaration before he eventually destroyed it. After declaring martial law, Yoon sent troops and police officers to the opposition-controlled National Assembly, but enough lawmakers managed to enter an assembly chamber and voted down his decree, forcing his Cabinet to lift it. Yoon was later impeached by the assembly, with some of his ruling party lawmakers voting to suspend his presidential powers. Yoon has arguedhis decree was a desperate attempt to draw public support of his fight against the "wickedness" of the main liberal oppositionDemocratic Party, which had obstructed his agenda, impeached top officials and slashed the government's budget bill. He earlier called the National Assembly "a den of criminals" and "anti-state forces." In January, state prosecutors arrested andindicted him on rebellion,a grave charge that would incur the death penalty or life imprisonment if convicted. In March, however,Yoon was releasedfrom prison after a judge at the Seoul district court canceled his arrest to allow him to stand trial without being held in custody. In April, the Constitutional Court formally dismissed Yoon as president, prompting a snap election to choose his successor. After winning that election, new PresidentLee Jae Myung,a former Democratic Party leader, approved legislation to launchindependent investigationsto uncover fuller details of Yoon's martial law stunt and delve into other criminal allegations involving his wife and administration. Lee named Cho an independent counsel to lead an investigation on Yoon's martial law decree. In May, state prosecutors indicted Yoon on charges of abusing power and forcing soldiers and police officers to try to seal the assembly and election offices, acts that are not part of their duties.