A teacher who authorities say admitted to fatally stabbing a couple he didn’t know who were hiking with two of their children in an Arkansas state park is expected to have his first court appearance Friday.

Andrew James McGann, 28, has been charged with two counts of capital murder in the killing Saturday of Clinton David Brink, 43, and Cristen Amanda Brink, 41. He is being held without bond and is expected to appear at the Washington County Detention Center.

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Arkansas State Police Col. Mike Hagar said authorities are trying to determine a motive for the attack at Devil’s Den, a 2,500-acre (1,000-hectare) state park near West Fork, about 140 miles (220 kilometers) northwest of Little Rock, the state capital. Its trails have been closed to t

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