St. Cloud police say a Moorhead, Minnesota, man was arrested Wednesday after allegedly poisoning his roommate with thallium earlier this year.

According to police, a 35-year-old man who's currently being held at the Stearns County Jail intentionally poisoned another man, identified as 33-year-old Cody Ray Ernst, in June.

Staff at the University of Minnesota Hospital in Minneapolis found Ernst had "an extremely high and lethal level" of thallium in his system after he was admitted. Police say they were notified about his admission on June 20 and add that Ernst was in critical condition at the time.

Ernst died two days later from what police say are medical complications directly related to ingesting thallium.

After working with multiple police departments and sheriff's offices across th

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