On this day, 35 years ago, on April 7, 1990 (March 12, 1990 in the lunar calendar), a US court found former President Reagan's national security adviser guilty. On April 7, 1990, the U.S. federal special court issued a ruling, declaring former President Reagan's national security adviser, Poindexter, guilty of obstructing congressional investigations, lying to Congress, and destroying government documents in the "Iran-Contra" case. Five crimes. The federal special court hearing in the Poindexter case began on March 5. The defendant's lawyers argued that Poindexter's actions during the "Iran-Contra" incident between 1985 and 1986 were to follow President Reagan's instructions and not "act without authorization", and that his actions after the incident was exposed were also "act under orders" to "protect superiors," as evidenced by White House documents and Reagan's diaries. However, Reagan exercised his "executive privilege" to refuse to hand over the diary, and used excuses such as "can't recall" or "can't remember clearly" in video testimony to avoid all critical issues. Therefore, the defendant's lawyer believed that the court's decision was unfair. The Iran-Contra incident is the biggest scandal in American politics after the Watergate Incident. After three years and four months of investigation costing $20 million, the trial of nine defendants has basically ended. However, the "Iran-Contra" case seems to be over. Whether President Reagan knew or approved his officials secretly sold arms to Iran from 1985 to 1986 in exchange for Iran's release of American hostages held in the Middle East, and then diverted the funds from the arms sales to support the activities of the anti-government armed forces in Nicaragua, and whether President Reagan instructed his officials to conceal the truth and deceive Congress after the incident was revealed remains a mystery. On June 11, 1990, Poindexter was sentenced to six months in prison by the U.S. District Court in Washington.