Officials are investigating two more inmate deaths from the South Dakota Penitentiary.

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Sioux Falls, SD (KELO.com) — The Division of Criminal Investigation and South Dakota Penitentiary officials are investigating two inmate deaths. 37-year-old Larry Franklin died in the Jameson Annex of the Sioux Falls Penitentiary Thursday. 21-year-old Ray Jackson died of an apparent suicide Friday. 22 inmates have died in the prison system so far this year.