A Minnesota man who reportedly had many questions for the Internet about a banned poisonous substance has been charged with murder after his roommate died of poisoning .

Stuart Hanmer, 35, was arrested on Wednesday after an investigation into the death of Cody Ernst, 33, who died on June 22. According to a criminal complaint obtained by local news outlet St. Cloud Live, Hanmer and Ernst were roommates at a sober living facility; Ernst had been there for several months before Hanmer arrived in May.

The month Hanmer arrived, police said Ernst reportedly began experiencing strange, painful symptoms that sent him to the hospital several times over the ensuing weeks.

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