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.

Police late Wednesday announced that Andrew James McGann, 28, of Springdale had been arrested on two counts of capital murder in the killings. He was taken into custody at 4:57 p.m. at a business in Springdale, the Arkansas State Police said in a news release.