Minn. Stat. § 611.01: GROUND OF ARREST, KNOWLEDGE.

Every person arrested by virtue of process, or taken into custody by an officer, has a right to know from such officer the true ground of arrest; and every such officer who shall refuse to answer relative thereto, or shall answer untruly, or neglect on request to exhibit to the arrested person, or to any person acting in the arrested person's behalf, the precept by virtue of which such arrest is made, shall be punished by a fine not exceeding $3,000, or by imprisonment in the county jail not exceeding 364 days.