Arkansas authorities say a peaceful family hike turned into a deadly ambush, when a 28-year-old schoolteacher allegedly stabbed a married couple to death in front of their children at Devil’s Den State Park.

Arkansas State Police (ASP) arrested Andrew James McGann at a barbershop in Springdale at 4:57 p.m. Wednesday. Officials said that McGann was in the midst of a haircut when ASP officers tracked down the fugitive following the lethal attack on Saturday.

McGann was charged with two counts of capital murder in connection to the killings of Clinton David Brink, 43, and Cristen Amanda Brink, 41, who were found dead on a walking trail. Their daughters, who are 7 and 9, were not hurt and are being cared for by family members, authorities said.

Here is a timeline of what we know so far about the suspect and the killings:

— McGann appeared in Washington County Circuit Court for a preliminary hearing. He was formally advised of his rights and the charges against him.