On July 11, 2013, the 5th U.S. Circuit Court of Appeals turned down Doyle's appeal. Doyle's lawyers argued that Doyle's confession was not voluntary and that he had poor legal representation during his trial.
Excerpts From the 5th U.S. Circuit Court of Appeals Transcript:
In 2003, Doyle placed an order for delivery with the Chaha Donut shop, disguising his voice and saying his name was Mary. When Cho arrived to deliver the food, Doyle beat her to death with a baseball bat, put her body into a trash can, and attempted to clean the blood from the walls and floor.
He took her car, cell phone, and credit cards and drove to meet his friends, to whom he indicated he had murdered someone, stating that he was not "playing" anymore. They attempted to use Cho’s credit cards to make purchases. When Doyle learned that police had found Cho’s body, he fled.
Police searched the house where he had committed the murder and found his bloodstained clothes, blood spatters on the floor and walls, marks from the trash can’s wheels, and other evidence.
Doyle later abandoned Cho’s car at a car wash and threw her possessions into a nearby dumpster. The police found those items and the original receipt for the doughnut delivery.
Doyle’s mother tried to convince him to come to the police station to talk to officers, and although he agreed, he never did but was arrested shortly thereafter.
He eventually orally confessed to the crime under police questioning, taking more than two hours to write a ten-page confession.
Doyle was convicted and sentenced to death. During the punishment phase of the trial, significant evidence was produced by prosecution and defense pertaining to Doyle’s character and history. The prosecution presented evidence of Doyle’s violent past, including numerous violent outbursts in school and at home; there was evidence of Doyle’s ties to a violent gang.
The defense presented numerous witnesses who testified to Doyle’s good character and difficult upbringing. On cross-examination, one of the defense experts admitted that Doyle was not mentally retarded, had a normal IQ, and understood right from wrong.