Clinton David Brink and Cristen Amanda Brink were killed Saturday while on a hike with their two young daughters.

As the manhunt expands for a suspect in the murders of 43-year-old Clinton Brink and his 41-year-old wife, Cristen, Arkansas State Police released a composite sketch of a man seen at the park where the attack occurred and say they want to question him. NBC’s Aaron Gilchrist reports for TODAY.

Clinton and Cristen died heroes protecting their little girls, and they deserve justice,” the Brink family said.