Deputy Dawg or D. B. Cooper, a Mary MacIntosh novel, follows two true crimes that occurred within months of one another in 1971. Deputy Dawg was a lawless hippie in the late '60s and early '70s in Boulder and Nederland, Colorado, and he shot and killed Sheriff Guy Howard Gaughnor in Nederland in 1971. It was a senseless crime. ​D. B. Cooper was the hijacker of Northwest Orient Airlines Flight 305 from Portland to Seattle on November 24, 1971. He somehow managed to have his ransom demands met in Seattle and instructed the captain to fly the Boeing 727 at 10,000 feet with a flight plan to Mexico City. Somewhere near the Washington/Oregon border, he lowered the aft stairs and parachuted out into the dark rainy night with $200,000 strapped to his torso. He was never seen or heard from again, and the mystery remains unsolved. It is the only unsolved hijacking on U. S. soil. ​Mary MacIntosh (Mac) is the prosecuting attorney in Sheridan, Wyoming, and when Sheriff Kane is shot and killed leaving the Last Chance Saloon in Bighorn, Wyoming, she is faced with deciphering who the killer is. Deputy Dawg? D. B. Cooper? One must read this gripping novel to find out what happened.