that on August 8 the gang murdered James Judge Jr. and his new wife, Margene. The Amarillo, Texas couple were honeymooning in southwestern Colorado at the time. (Their bodies were not found until November 1978, at a campsite near Pagosa Springs, Colorado.) The gang returned to Arizona, driving the Judges' van on Interstate 10, when they encountered a police roadblock. They ran the roadblock, and a shootout took place at a second roadblock, south of Casa Grande, Arizona. Donald Tison, who was driving the van, was killed at the scene; the others fled on foot. Raymond, Ricky, and Greenawalt were quickly caught, but Gary Tison escaped into the desert. Over 300 police officers and hundreds of volunteers searched for him, but he eluded them. He did not elude the August desert — he died of exposure. His body was found eleven days after the shootout. Greenawalt and the surviving Tisons were charged with 92 crimes, including four counts of murder. (No charges were brought for the murder of the Judges, and Colorado authorities closed the cases when the surviving gang members were convicted in Arizona.) Criminal proceedings The two remaining Tison brothers were tried individually for capital murder in the deaths of the Lyonses. The murder charges were predicated on Arizona's felony-murder statute, which provided that killings that occurred during a robbery or kidnapping were first-degree, death-eligible murders. The Tison brothers were convicted. At a separate sentencing hearing, three aggravating factors were proved: the Tisons had created a grave risk of death to others, the murders were committed for pecuniary gain, and the murders were especially heinous, cruel, or depraved. The Arizona Supreme Court upheld the death sentences. In the intervening years, the Supreme Court decided Enmund v. Florida, leading the Tison brothers to bring a collateral attack on their sentences, claiming that Enmund required their death sentences to be struck down. The Arizona Supreme Court rejected this argument, asserting that the dictates of Enmund had been satisfied because the intent requirement of that case could be inferred from the fact that death was a foreseeable result of participating in a dangerous felony. Holding Justice Sandra Day O'Connor, writing for the majority, concluded that the death penalty would be appropriate for a murder like the ones the Tisons had been convicted of if it could be shown that the defendant was a major participant in the underlying felony and had