German police acknowledge major "DNA bungle" in hunt for non-existent serial killer:

Dubbed the "phantom of Heilbronn", the woman was described by police as the country's most dangerous woman. Investigators had connected her to six murders and an unsolved death based on DNA traces found at the scene.

Police now acknowledge swabs used to collect DNA samples were contaminated by an innocent woman working in a factory in Bavaria.

(Via GMSV.)