German authorities are pushing for a 100-year-old former Nazi concentration camp guard to face trial for aiding and abetting murder in over 3,000 cases. A lower court had deemed the suspect unfit to stand trial, but the decision was overturned by the higher regional court in Frankfurt. The expert's decision was found to be lacking sufficient facts. Germany has been working to bring the last surviving former Nazi war criminals to justice since a 2011 ruling, but many cases have been abandoned due to the death or physical inability of the accused.