Recent racially tinged incidents on college campuses:
--Duke University officials say a student hung a noose in a plaza of the North Carolina campus, but they refuse to release the person's name or race.
--Three students at Bucknell University in Pennsylvania are expelled over a campus radio broadcast in which they make racist comments and use a slur.
--Fraternity members at the University of Oklahoma are caught on videotape taking part in a chant that includes references to lynching and uses a racial slur to describe how the Sigma Alpha Epsilon fraternity will never accept black members.
--At the State University of New York's Purchase campus, someone spray-paints swastikas and nooses on the walls of three freshman dormitories. Police arrest 18-year-old Raymond Turchioe and charge him with aggravated harassment.
--Former University of Mississippi student Graeme Phillip Harris is indicted on federal civil rights charges. He is accused of tying a noose around a statue of the university's first African-American student last year.
--University of Virginia student Martese Johnson calls police racist after a violent arrest by state Alcoholic Beverage Control police. Video of his blood-soaked face appears on social media. He plans to plead not guilty to public intoxication or swearing and obstruction of justice.
--An Arizona State University police officer resigns after being caught on video slamming a black female professor to the ground during an arrest for walking in the middle of a street near campus. English professor Ersula Ore pleads guilty to a misdemeanor count of resisting arrest, saying she was walking in the street on May 20 because construction work obstructed the sidewalk.