A Wisconsin couple is dead and their 25-year-old son has been charged with their deaths.

The Winnebago County Sheriff’s Office identified the couple on Monday as 72-year-old David Metzig and 71-year-old Jan Metzig, owners of the Union Star Cheese Factory in Fremont, WFRV reports.

Deputies said they went to the home early Saturday morning and found the bodies, saying at the time the deaths were “suspicious in nature.”

Erik Metzig, the couple’s son, made an initial court appearance on Tuesday and was charged with two counts of first degree murder, WGBA said.

A criminal complaint said that police were called to the home at about 5:15 a.m. on Saturday and found the Metzigs in a bedroom, covered in blanks. They both appeared to have been shot in the head. Their son was arrested at the Heart of the Valley YMCA, where investigators found red smears in his vehicle, which are being tested for blood.

The complaint did not mention a motive, but it said that investigators found a journal in the younger Metzig’s bedroom in which he wanted to kill his parents and make it look like they went missing while out on a walk.

According to an obituary, the Metzigs had five sons.

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[Featured image: Jan and David Metzig/Post Crescent and Erik Metzig/WGBA]