Under CopyrightPagel, FrankFrankPagelMoßgraber, JürgenJürgenMoßgraberDecker, C.C.DeckerGermann, J.-P.J.-P.Germann2022-03-1213.10.20152015https://publica.fraunhofer.de/handle/publica/38921810.24406/publica-fhg-389218Each weekend, about 3000 federal police officers and additional forces of the state polices secure the fan traffic to and from the stadiums. Sometimes, small groups among the fans are violent and cause dangerous situations for fans and travellers. It is the first obligation of the security forces to detect violent acts and to withdraw offenders. However, for convictions at Court a complete chain of evidence is required. Here, it must be strictly taken care of differentiating offenders from peaceful fans in the crowd. The research project Muskat aims at improving the security while respecting the citizens' privacy and fundamental rights. Therefore, a multi-sensor platform will be developed in order to support security forces in the field by tracking single offenders and generating Court proof evidence in a shorter time. This paper presents the activities of the Muskat project under technical, legal and ethical viewpoints.enMulti-Sensor Clusterprivacy-by-designtrackinglaw enforcementperson retrievalinformation control centerdense crowdsevidence preservationconference paper