Weeks after the "Caracazo", Chávez returned to work at Miraflores. Chávez recalled that the presidential palace's guards stopped and questioned him. They reportedly asked him: "ook here, major, is it true about the Bolivarian Movement? We'd like to hear more about it; we're not prepared to go on killing people". Chávez took this as a sign that his plan to overthrow the government was gaining momentum. By late 1989, the first civilians joined the EBR-200's ranks. The EBR-200 thus changed its name to the "Movimiento Bolivariano Revolucionario-200" (MBR-200—the "Revolutionary Bolivarian Movement-200"). The supplanting of the word "Army" ("Ejército") with "Movement" ("Movimiento") was intended to punctuate this shift. However, on 6 December 1989, Chávez along with other senior officers were abruptly arrested. They were brought before army command on charges of plotting a coup that was suspected by the government as planned for Christmas Day. They were accused of planning the assassination of high government officials, including President Pérez. Yet the officers were eventually released—due to lack of evidence. The government was reluctant to prosecute officers who were recognized in the military as among the best in their respective armed services. Nevertheless, all—including Chávez—were thereafter sent to posts far from the federal government in Caracas. Chávez was sent in 1990 to Maturín, where he was appointed the official in charge of civilian matters with the Ranger Brigade headquartered in the area. Chávez was later allowed to matriculate at the Universidad Simón Bolívar ("Simón Bolívar University") in Caracas, where he did graduate work in political science. He left without a degree. Chávez took courses until August 1991.