Book 4 in the Gabriel Hawke Novels Killer on the loose. Tracking Rivalry. Revenge could get them killed. Fish and Wildlife Oregon State Trooper Gabriel Hawke is set to teach a class at a Search and Rescue conference in Idaho when a dangerous inmate breaks out of prison. It is believed the man is headed to Hells Canyon. Hawke is enlisted to find the escapee. He's paired with a boastful tracker who doesn't follow directions, making them both targets. Before the dust settles, the other tracker is dead and Hawke is twisting in the wind for letting the possible killer get away.