Dr. Jack Kevorkian died at age 83 Friday morning at a Michigan hospital. Kevorkian was a controversial figure; outspoken on assisted suicide, the doctor said he helped 130 people who had chosen to end their lives. Terry Youk's brother, Thomas, was euthanized in 1998 with the help of Jack Kevorkian. He supported his brothers challenging decision. Professor of political science at Dickinson College, Jim Hoefler is an expert in biomedical ethics and end-of -life decision making. He says that Jack Kevorkian "muddied the waters" in the end-of-life debate by choosing to help people who weren't in dire circumstances.