Corrections officer Sgt. Charles Galaviz secures an inmate for transfer with handcuffs and shackles Jan. 24 at the Lexington Assessment and Reception Center, in Lexington, Okla. Overtime is mandatory for correctional officers in the state's prisons, which have a manpower shortage of about 33 percent and the highest inmate homicide rate in the country. Sue Ogrocki/AP hide caption

itoggle caption Sue Ogrocki/AP

Inmate Calvin Hodge stirs gravy in preparation for lunch at the Fife and Drum Restaurant at the Northeast Correctional Center in Concord, Mass. Erik Jacobs/For NPR hide caption

itoggle caption Erik Jacobs/For NPR

Inmates at Second Chances Farm in Maryland tend to thoroughbreds after their racing days are over.

Maryland Department of Public Safety and Correctional Services hide caption

itoggle caption Maryland Department of Public Safety and Correctional Services