When long-time and highly decorated Jasper County Sheriff’s Lt. Eric Nation suddenly announced his resignation last May, many people were scratching their heads, wondering why.

Although officials of the sheriff’s department still won’t discuss specifics eight months later, public records obtained by the Daily News show that Nation was investigated by the Iowa Department of Criminal Investigation for possible misuse of county property and “misconduct with female contacts and confidential informants.” No details about those allegations have been made public.

But DCI Assistant Director Chari Paulson has since told the Daily News that her agency completed its investigation into the criminal allegations against Nation. She said the Iowa Attorney General’s Office had reviewed the findings and decided not to file criminal charges.