The mystery of Iraq war veteran Chase Massner is the hottest topic on CrimeOnline’s podcast call-in line. Listeners of “Crime Stories with Nancy Grace” have been raising good questions about the investigation. Massner was 26 when he disappeared after spending the night at a friend’s home in Kennesaw, Georgia on March 27, 2014. Grace and Leigh Egan, our prime reporter covering the story, answer caller questions in this episode.