David Oliver Relin, a journalist who co-authored the controversial best-selling book Three Cups of Tea, has committed suicide, the New York Times reports. He was 49. Relin, who co-wrote the 2006 book with Greg Mortenson about how Mortenson, a former mountain climber, started building schools in Pakistan and Afghanistan, "suffered emotionally and financially as basic facts in the book were called into question," the Times says. His family said Relin "suffered from depression" but would not give further details surrounding his death. As a journalist during the '90s, Relin focused on telling humanitarian stories including articles about child soldiers and traveling to Vietnam.