Huntington Beach California, November 20th, 1999. >> [music] >> Dr. Kenneth Stahl took his wife Carolyn to a birthday dinner. She was 44 years old. He was a prominent physician. She was an optometrist. They were well-liked, well-respected. [music] A successful California couple on a birthday evening out. After dinner, Kenneth suggested they take the scenic route home. Ortega Highway, a winding mountain road 30 miles from their house. It was not a spontaneous [music] suggestion. Police found their car on Ortega Highway later that night. Headlights on, [music] engine idling, both doors closed. Carolyn [music] O'Fee Stahl had been shot multiple times. Kenneth Stahl had been shot multiple times. Both were dead. For more than a year, investigators had nothing. A remote highway, >> [music] >> almost no physical evidence. A couple with no apparent enemies, >> [music] >> no apparent motive. Kenneth was treated as a victim. His family mourned him publicly. [music] Then the case cracked open. Kenneth had been conducting a 9-year affair with a woman named Adriana Vasco. He could [music] not divorce Carolyn. The financial settlement would have ruined him. So he arranged something [music] else. Vasco had met a man named Dennis Godley, who called himself [music] Tony Saturn when he came to fix her sink. He told her he was a hired killer. She introduced [music] him to Kenneth. Kenneth paid him in advance. The plan: Godley kills [music] Carolyn on the birthday drive. Kenneth collects a million dollars in life insurance. Everyone walks away. Godley killed Carolyn. Then he turned the gun on Kenneth. Kenneth was the only person who could identify him. Godley eliminated the witness. [music] Investigators searched Adriana Vasco's storage unit. Inside, driver's license photographs of both Kenneth and Carolyn. A photograph of herself with Godly. She had purchased [music] the same type of revolver used in the murders. Months before the killings, Kenneth withdrew $20,000 in cash. Shortly after, [music] Vasco arrived at work wearing new jewelry from Godly. In 2002, Vasco was convicted. Life [music] without parole. Godly pleaded guilty to avoid the death penalty. He died in prison from cancer. But before he died, through his lawyer, [music] he made one final claim. He said he killed Kenneth. But Vasco, he claimed, [music] had pulled the trigger on Carolyn. The claim was never proven. Vasco has [music] always denied it. Carolyn Oppie Stall had no idea what her husband had [music] planned for her birthday. She went to dinner. She got in the car. She trusted him.