Fingerprint analysis was the state of the art a century ago; this DW film tracks what has replaced it. At the State Criminal Police Office (LKA) in Wiesbaden and forensic labs in Frankfurt, investigators demonstrate how the smallest traces of DNA can now identify a suspect, and how laser scanners rebuild crime scenes as navigable 3D models that let detectives walk back through a killing step by step. The same scanning technology is turned on corpses, replacing parts of the traditional autopsy with digital reconstruction. Specialists explain how these tools narrow the list of suspects faster than older methods ever could. But the film also follows the flip side: freely available AI software that lets criminals fabricate convincing fake video and audio, a problem investigators are only beginning to counter. Interviews with LKA forensic scientists and technicians carry the film, paired with lab demonstrations and scanning footage rather than dramatization. The result is a grounded look at a field racing to stay ahead of the technology it now has to police.