On March 27, 1988, Greenway and Christopher Lincoln. burglarized the Tucson home of Lili Champagne.

Greenway shot and killed Mrs. Champagne and her 17-year-old daughter, Mindy, with a .22 rifle. He and Lincoln then stole some property, including Mrs. Champagne's Porsche. The two later abandoned the Porsche after setting it on fire.

Greenway later boasted to a jail inmate that he had killed the women because they had seen his face. Lincoln, a juvenile, was tried as an adult and convicted for the murders. He received concurrent life sentences.