The last person to see Chris Smith was his business partner, Ed Shin. But when he tells investigators his version of what happened, the story takes another unexpected turn. "Cutthroat Inc." is produced by ABC's 20/20 and ABC Audio, makers of "The Dropout," "Truth and Lies: Jeffrey Epstein," "Have You Seen This Man?," "A Killing On the Cape," the daily ABC News podcast "Start Here," and more: http://www.abcaudio.com/podcastsLearn more about your ad choices. Visit megaphone.fm/adchoices