Jack Owen Spillman III was born Roy Wilson on August 30, 1969, in Spokane, Washington.

In April 1995, Jack Owen Spillman III was convicted of the brutal murders of Rita Hoffman, who was 48 years old, and her 14-year-old daughter, Mandy. These murders took place in their home in East Wenatchee, Washington. The bodies of both victims were found with severe injuries. They had been bludgeoned, stabbed, and mutilated. The violent nature of the crimes shocked the community.

Mandy was assaulted in a horrific way. Spillman used a baseball bat in the attack and committed acts of mutilation. Rita had also suffered greatly; she was stabbed multiple times, and her body showed signs of extreme violence. The scene indicated that Spillman posed their bodies in suggestive positions after the crime, which added to the gruesome nature of his actions.

Spillman's black pickup truck was spotted near the victims' home on the night of the murders. Police later pulled him over that evening and found a 12-inch knife covered in blood in his truck. This knife appeared to match a knife that belonged to the victims. After the incident, Spillman was under surveillance for about a week while forensic tests were conducted.

In addition to the Hoffman murders, Spillman confessed to the murder of 9-year-old Penny Davis, who had gone missing in September 1994. Her remains were discovered six months later, buried in a remote area. Like the other victims, her body was also posed after death.

To avoid the death penalty, Spillman pleaded guilty to three counts of first-degree murder in 1996. He received a life sentence without the possibility of parole and is currently incarcerated at the Washington State Penitentiary.

While in prison, Spillman expressed a desire to be known as a prominent serial killer and claimed to have stalked his victims. These statements were made to a fellow inmate. The case received considerable media attention and has been featured in various crime-related programs.