Minnesota officials filed a lawsuit within hours, trying to get access to evidence and independently investigate what happened to Pretti. The lawsuit accuses federal officials of an “apparent determination” to deny state and local law enforcement evidence, illegally hindering their ability to do their jobs. Federal officials argued back they are maintaining the evidence — and are not legally required to share it with Minnesota officials amid their investigation. In both cases, state officials say they have been barred from accessing key evidence. Federal agents denied that request.