Police had been searching for McGann since July 26, when they say he fatally stabbed Clinton David Brink, 43, and Cristen Amanda Brink, 41, while they were hiking in Devil's Den State Park with their two daughters, aged 7 and 9. The children weren't hurt and are safe with family members, according to police.

Police are searching for a killer after a husband and wife were murdered while hiking with their young daughters at a remote state park in Arkansas.