Minn. Stat. § 626A.07: RETURN FILED BY OFFICER.

Upon expiration of a warrant issued under section 626A.06, the officer designated in the warrant shall forthwith deliver the original warrant and accompanying papers to the judge issuing the same, together with a written return, verified by the certificate of the officer, setting forth:

(1) the precise description of each installation of an instrument for the interception of communications, and the designation of any telephone or telegraph lines involved in such interception;

(2) the date or dates on which interception was conducted; and

(3) an identification of all recordings made as required herein. Said recordings shall be delivered to the issuing judge with the return.