A nurse from Kimball has pleaded guilty to stealing pain-killing drugs while working at the St. Cloud Hospital. 42-year-old Blake Zenner admitted that he accessed lock boxes while working as a registered nurse and used syringes to remove the pain-killing drugs from intravenous bags. In some cases, Zenner injected saline into the bags to replace the missing drugs. Authorities say as a result, 25 hospital patients were infected with bacteria. The crimes took place from November 2010 to March of 2011. Zenner faces up to four-years in federal prison. His sentencing date has not yet been set.