Upon taking office in 2007, Van Hollen took on a backlog of DNA evidence at the Wisconsin State Crime Laboratory. The backlog had grown to thousands of cases. He worked with the Wisconsin Legislature to secure additional resources to solve the backlog and created new efficiencies at the Crime Lab. In 2008, Van Hollen announced changes made by his administration have reduced the backlog by 43% since he took office. His goal was to eliminate the backlog by December 2010. One of the cold cases led to the arrest of Walter Ellis, a suspected serial killer in Milwaukee. In September 2008, Van Hollen sued the
Wisconsin Government Accountability Board, the state elections agency, to force it check voter registrations for accuracy. Van Hollen said that the motivation for the lawsuit was that potentially illegal votes could sway the election. On October 23, 2008, a Dane County circuit judge dismissed the lawsuit, ruling that Van Hollen did not have standing to bring the lawsuit, because only the
United States Attorney General can enforce federal law. Van Hollen appealed the judge's ruling but later dropped it when the Government Accountability Board updated their voter check procedure. On October 7, 2013, Van Hollen announced he would not seek reelection in 2014 for a third term as attorney general. ==Electoral history==