Terrence Miller, 78, was arrested in 2019 after DNA linked him to the murder of Jody Loomis, 20. Loomis died on Aug. 23, 1972.
Miller died by suicide hours before a jury was going to convict him, according to Washington state authorities.
The body was found in his home in Edmonds, roughly 16 miles north of Seattle, according to a statement posted on Facebook from the Snohomish County Sheriff’s Office.
On Monday, a jury found Miller guilty of first-degree murder, despite the fact that he died, according to The Seattle Times.
After two weeks on trial, Miller was convicted of shooting Loomis when she was riding home on a bike. Later that day, two people found her disrobed and suffering from a gunshot wound. She later died in the hospital, according to NBC News.
Miller had posted $1 million bond in 2019. The judge had him turn in all weapons he owned and was monitored by an electric home monitoring company.