This is National Police Week. May 15 is designated annually as National Peace Officer’s Memorial Day.  Pella Police Chief Michael Marcinkowski says this is an opportunity for citizens to reflect on the sacrifices that police officers make in Iowa. Knoxville Police Chief Dan Losada says he hopes people appreciate these sacrifices. Officer John E. Van Haaften with the Pella Police Department was killed in the line of duty in 1980. Deputy Harold Gates with the Marion County Sheriff’s Department lost his life in the line of duty in 1967.