b. Rules for closed investigations.

When an investigation is closed and no prosecution or disciplinary action is either ongoing or contemplated, there is no risk that releasing a police report will interfere with an enforcement proceeding or jeopardize anyone's right to a fair trial. Linzmeyer v. Forcey, 2002 WI 84 ¶ 39, 254 Wis. 2d 306, 331, 646 N.W.2d 811, 821. A law enforcement agency's internal investigation is deemed closed when the agency has taken disciplinary action; it does not remain open because of the possibility of review in arbitration. Local 2489, AFSCME v. Rock County, 2004 WI App 210 ¶20, 277 Wis. 2d 208, 225, 689 N.W.2d 644, 653 (fact that sheriff must defend disciplinary action in arbitration does not mean that records of prior, completed investigation become immune from disclosure pending outcome of arbitration).