High Quality Content by WIKIPEDIA articles! Lemrick Nelson, Jr. (born July 31, 1975) is an African-American man who stabbed Hasidic student Yankel Rosenbaum to death during the racial unrest of the 1991 Crown Heights riot. Though his lawyer did not deny at his trial that Nelson stabbed Rosenbaum, he argued that the killing had nothing to do with Rosenbaum`s being Jewish.