Arkansas teacher Andrew McGann arrested for allegedly stabbing married couple Clinton and Cristen Brink to death during random attack at Devil's Den State Park.

Prosecutors in Arkansas say Andrew James McGann left a hiking trail at a state park a bloody mess after stabbing a couple to death ... and folks saw him leaving the scene with blood on his face. In new legal docs,

LITTLE ROCK, Ark. — A teacher admitted he fatally stabbed a couple he didn’t know who were hiking with two of their children in an Arkansas state park, authorities said Thursday, after a five-day search and hundreds of tips led to his arrest.