What happened in Vegas—By John D'Agata and Jim Fingal (Harper's Magazine) 
This is fascinating… as my old journalism teacher said on Facebook, it’s a bit of “the sausage being made.”
From The Lifespan of a Fact, by writer John D’Agata and Jim Fingal, published in February 2012 by W. W. Norton. In 2005, as an intern at The Believer, Fingal began fact-checking D’Agata’s article on the 2002 suicide of Las Vegas teenager Levi Presley. The book is based on emails exchanged by D’Agata and Fingal. The fact-checked article appeared in The Believer in 2010.