Fifty years ago, Supreme Court Justice Thurgood Marshall took his place as the nation’s first African-American to reach the high court.Now, more than two decades after his death, his legacy may be in jeopardy, several prominent African-American legal scholars said Wednesday at the AMC River East 21 Theatre.“Just about everything he cared about is in jeopardy today,” said 7th U.S. Circuit Court of Appeals Judge Ann Claire Williams.“You look at the whole range of things: The death penalty, affirmative …