The Village Voice has a fascinating two-part article on Columbia Teachers College "noose" professor Madonna Constantine: Part 1, Part 2.
Constantine, you will recall, reported finding a small noose hung on her office door, making her a cause celebre at Columbia for a time -- a victim of America's racist culture. Oddly, she objected when investigators tried installing hidden cameras in the hallway to catch the perp...and then it came to light that she had been the subject of a massive plagiarism investigation.