He was a mystery who intrigued thousands: Who was the hiker who walked almost the entire length of the Appalachian Trail, living completely off the grid, only to be found dead in a tent in Florida? It took years, and the persistence of amateur sleuths. to crack the case. Nicholas Thompson of The Atlantic Magazine tells the tale of the man who went by the name "Mostly Harmless," and about the efforts stirred by the mystery of his identity to give names to nameless missing persons.

Subscribe to the "CBS Sunday Morning" Channel HERE: http://bit.ly/20gXwJT
Get more of "CBS Sunday Morning" HERE: http://cbsn.ws/1PlMmAz
Follow "CBS Sunday Morning" on Instagram HERE: http://bit.ly/23XunIh
Like "CBS Sunday Morning" on Facebook HERE:   / cbssundaymorning  
Follow "CBS Sunday Morning" on Twitter HERE: http://bit.ly/1RquoQb

Get the latest news and best in original reporting from CBS News delivered to your inbox. Subscribe to newsletters HERE: http://cbsn.ws/1RqHw7T

Get your news on the go! Download CBS News mobile apps HERE: http://cbsn.ws/1Xb1WC8

Get new episodes of shows you love across devices the next day, stream local news live, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B

---
"CBS Sunday Morning" features stories on the arts, music, nature, entertainment, sports, history, science, Americana and highlights unique human accomplishments and achievements. Check local listings for CBS Sunday Morning broadcast times.