Fraud in the billing of outpatient care services has become a criminal phenomenon with increasing case numbers in recent years. This causes great damage to the social insurance system and results in enormous costs of several billion euros annually for the community of solidarity. Together with the Public Prosecutor's Office in Dresden and the Commissariat for Economic Crime of the Leipzig Police Department, researchers of Fraunhofer Institute for Industrial Mathematics ITWM are taking action against this. They are developing AI software against billing fraud in the »PflegeForensik« project. The work is funded by the German Federal Ministry of Education and Research (BMBF).