Andrew James McGann, 28, of Springdale, was arrested and is accused of killing Clinton and Cristen Brink while they were hiking at Devil's Den State Park in Arkansas. Here is what we know about the suspect:

Andrew James McGann, 28 — who authorities say admitted to butchering Clinton David Brink, 43, and wife Cristen Amanda Brink, 41, on Saturday — was strange and standoffish in class, said Sierra Marcum, whose son was in McGann’s fourth-grade class.