A Brooklyn couple who hosted a popular self-help radio show were found dead in their Park Slope apartment Monday in what police now say was a double suicide. Lynne Rosen, 46, and John Littig, 48, were found on their couch donning plastic bags around their heads. The pair left behind suicide notes saying they were sorry, but they had to end their lives together. Rosen, a psychotherapist, and Littig, a motivational speaker, often talked about embracing change on their radio show, The Pursuit of Happiness. The exact day of their death remains unclear.