In the early hours of the morning on October 13, 1980, two police officers were out on patrol in Harrisburg in an unmarked car. They heard gunfire coming from a nearby wooded area which was unlit and often used for dumping trash. As they approached the scene they found a 1967 Ford van parked on a dirt road near some bushes. After hearing rustling noises coming from the bushes they ordered the person making the noise to come out. Zettlemoyer emerged from the woods holding a handgun and a flashlight. Zettlemoyer claimed he had been shooting rats, but the officers were not convinced. Zettlemoyer was ordered to drop the gun and was then secured. One of the officers searched the area and came across the body of 29-year-old Charles DeVetsco. He had been shot a total of four times. It later emerged he had been shot twice in the van while handcuffed and was then dragged from the van to the woods where two more fatal shots were fired. The cause of death was confirmed as a massive hemorrhaging of the heart, which had been penetrated by.357 magnum bullets.
Trial and execution
DeVetsco had worked with Zettlemoyer at a retail store. He had been scheduled to testify against Zettlemoyer in an upcoming robbery trial in Snyder County. Zettlemoyer and an accomplice had carried out a robbery in May 1980. They had bound a security guard at a RadioShack near Sunbury and had stolen electronic equipment worth thousands of dollars. The accomplice was later caught trying to return the equipment for money and had named Zettlemoyer as his partner. Zettlemoyer had then told DeVetsco about the heist. DeVetsco contacted the authorities, and had planned to testify against Zettlemoyer. Zettlemoyer had kidnapped DeVetsco near Selinsgrove and had driven him to Harrisburg to kill him. The reason he killed him was in order to prevent his testimony. On April 24, 1981, Zettlemoyer was convicted of first degree murder and was sentenced to death. After spending fourteen years on death row, Zettlemoyer fired his lawyers and dropped his efforts to live. He begged the courts to let him die because he claimed "brain disease" was making his life hell. Doctors reported that Zettlemoyer was suffering from posttraumatic stress disorder. Lawyers for the Pennsylvania Post-Conviction Defender Organization argued that Zettlemoyer was not mentally competent, however, three psychiatrists testified he was sane. DeVetsco's mother also argued that Zettlemoyer was mentally ill and was therefore not competent to be executed for the murder of her son. Zettlemoyer was executed by lethal injection on May 2, 1995, at State Correctional Institution – Rockview. His last meal was two cheeseburgers, french fries, chocolate pudding and chocolate milk. He became the first person to be executed by the state of Pennsylvania since the resumption of the death penalty in 1976 and the first inmate put to death in Pennsylvania in thirty-three years. He remains the first of only three people to be executed in Pennsylvania since the resumption of the death penalty. The others were Leon Moser in August 1995 and Gary M. Heidnik in 1999.