 Denise Austin, Simmons' longtime friend and fellow fitness guru, said she was, quote, heartbroken. Every time we were together, we had so much fun, filled with hugs, laughter, and tears. Simmons died at his home on Saturday, just one day after turning 76. Tanya J. Powers, Fox News. James Sicking, the Emmy-nominated star of the 1980s police drama Hill Street Blues and of Doogie Howser, M.D., has died. As publicist Cynthia Snyder said in a statement, Sicking died of complications from dementia.