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

An ambulance makes its way through revelers in Cardiff city center in Wales in 2010. New measures in the city have reduced injuries caused by violence. Matt Cardy/Getty Images hide caption

itoggle caption Matt Cardy/Getty Images

A yard sign opposes a local tax increase to fund public safety in Josephine County, Oregon. The ballot measure reportedly failed by a thin margin. Amelia Templeton/OPB hide caption

itoggle caption Amelia Templeton/OPB