William Kunstler, whom wags have called "the most hated lawyer in America," died Monday in New York of a heart attack. The radical barrister, once "special trial counsel" to Martin Luther King Jr., made a national name for himself defending the Chicago Seven and, more recently, such diverse and controversial figures as Indian activist Leonard Peltier, flag burner Gregory Johnson, mob boss John Gotti and Washington, D.C. Mayor Mayor Marion Barry. "He was definitely one of the leading left-of-center lawyers in this century," says legal correspondent Adam Cohen. "His cases showed the country that it was divided on many issues. But he was criticised late in his career of being something of a media hound. And to some extent, he earned that criticism. Toward the end he seemed to be driven by the limelight."