Truman Garcia Capote was an American writer. He died in Los Angeles, California on 25th August, 1984. According to Coroner's report, the cause of Capote's death was "liver disease complicated by phlebitis and multiple drug intoxication" You can find more information here: http://en.wikipedia.org/wiki/Truman_capote
Truman Capote's death was caused by liver disease, made worse by phlebitis and a drug intoxication. Capote had been a regular on the Johnny Carson show and died at the home of Johnny's ex wife, Joanne Carson.