Jack Kevorkian, a controversial American Pathologist known as 'Dr Death' for his efforts to legalise euthanasia and assisted suicide in the United States, has died in a Detroit area hospital following a short illness at the age of 83.Kevorkian died on Friday after being hospitalised at William Beaumont Hospital in Michigan since May with pneumonia and kidney problems.Kevorkian became an international talking point in the 1990s.