An 84-year-old southern Minnesota man has been charged with murder in a 50-year-old cold case once thought to be the work of a notorious serial killer and former Green Bay Packer.

Investigators in Wisconsin used genetic genealogy to solve a 50-year-old cold case this week, charging an 84-year-old Minnesota man with murdering a woman who was found dead in 1974, authorities said.

Mary K. Schlais was found dead in the town of Spring Brook on Feb. 15, 1974. This week, a man “confirmed his involvement" with the homicide, officials said.

Police arrested Miller in his Owatonna apartment, and according to Sheriff Bygd, he confessed to his involvement in Schlais's murder to investigators after being presented with evidence. Investigator Daniel Westlund for the Dunn County Sheriff's Office says that police have spoken to Schalis's family and are "relieved and very thankful for our agency and everyone that's assisted thus far in the investigation.

Schlais, 25, was found dead near the intersection of 408th Avenue and 990th Street in Spring Brook Township in Dunn County, Wisconsin, on Feb. 15, 1974. She was hitchhiking from Minneapolis to an art show in Chicago.