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

Andrew James McGann, the former North Texas elementary school teacher who is accused of murdering a couple hiking with their children at Devil’s Den State Park in Arkansas, was in the middle of a haircut when he was captured.