Clinton David Brink, 43, and Cristen Amanda Brink, 41, were found dead Saturday at the park in Washington County, police said. They were hiking with their daughters, ages 7 and 9.

Andrew James McGann, 28, was arrested at 4:57 p.m. local time on July 30 at a business in Springdale, Arkansas, state police said.

Arkansas police say the killer of a married couple who had been hiking the remote Devil’s Den State Park with their young daughters was likely injured during the weekend attack.