A Wisconsin prison inmate has been charged with first-degree murder in a 37-year-old cold case.

Donald Wayne Maier, now 60, was charged in the 1985 slaying of 28-year-old Benny Scruggs, the state Department of Justice announced Wednesday.

Scruggs was found stabbed to death in his bed in his Wisconsin Rapids home.

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A Wisconsin inmate has been charged with homicide for a murder that took place in 1985.

Maier is serving 15 years in prison for six counts of stalking in an unrelated case. A criminal complaint charging him in Scruggs' death said he confessed it to fellow inmates, and also said he was having an affair with Scruggs' wife.

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Court records did not list an attorney for Maier, who faces an initial court appearance on Friday.