Sean Hodgson watched and worried as his best friend of nearly two decades unraveled. His former roommate and fellow U.S. Army reservist's anger and paranoia were mounting, he had access to guns, and he refused to get help. So Hodgson did the hardest thing of his life: He sent a text about Robert Card to their Army supervisor.
"I believe he's going to snap and do a mass shooting," he wrote on Sept. 15.
