South Dakota's highest ranking law enforcement officer is criticizing the state's prison system as officials open another investigation into a suspected drug overdose involving an inmate.

The South Dakota Department of Corrections announced in a Nov. 17 press release that 46-year-old Timothy Tyree died after being found unresponsive in his bed at Mike Durfee State Prison that same day. According to the DOC, Tyree was taken to a nearby hospital where he passed away.

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