If this person is so dangerous, why are they being released from prison in the first place? Minnesota is a state that has specific sentence lengths for specific crimes, known as determinate sentencing. When an offender is sentenced to prison by the judge, the length of required prison time had been previously established for that offense by the Guidelines Commission, and applies to anyone convicted of the same offense. Someone with no previous criminal offenses may have a shorter sentence than someone who has been in trouble before.
In Minnesota, people are released from prison after serving two-thirds of their sentence with the last third to be served at a workhouse, halfway house, etc. While out on work release, offenders are being monitored by probation officers. At some point, the offender will have served the sentence mandated by law and must be released from prison and/or probation. Once the sentence is finished, neither the Minneapolis Police Department, nor the courts have the authority to tell the offender where they can live or work.