https://www.revisor.mn.gov/statutes/?id=624.714
(b) Failure of the sheriff to notify the applicant of the denial of the application within 30 days after the date of receipt of the application packet constitutes issuance of the permit to carry and the sheriff must promptly fulfill the requirements under paragraph (c). To deny the application, the sheriff must provide the applicant with written notification and the specific factual basis justifying the denial under paragraph (a), clause (2) or (3), including the source of the factual basis. The sheriff must inform the applicant of the applicant's right to submit, within 20 business days, any additional documentation relating to the propriety of the denial.
Upon receiving any additional documentation, the sheriff must reconsider the denial and inform the applicant within 15 business days of the result of the reconsideration. Any denial after reconsideration must be in the same form and substance as the original denial and must specifically address any continued deficiencies in light of the additional documentation submitted by the applicant. The applicant must be informed of the right to seek de novo review of the denial as provided in subdivision 12.
Subd. 12.Hearing upon denial or revocation. (a) Any person aggrieved by denial or revocation of a permit to carry may appeal by petition to the district court having jurisdiction over the county or municipality where the application was submitted. The petition must list the sheriff as the respondent. The district court must hold a hearing at the earliest practicable date and in any event no later than 60 days following the filing of the petition for review. The court may not grant or deny any relief before the completion of the hearing. The record of the hearing must be sealed. The matter must be heard de novo without a jury.
(b) The court must issue written findings of fact and conclusions of law regarding the issues submitted by the parties. The court must issue its writ of mandamus directing that the permit be issued and order other appropriate relief unless the sheriff establishes by clear and convincing evidence:
(1) that the applicant is disqualified under the criteria described in subdivision 2, paragraph (b); or
(2) that there exists a substantial likelihood that the applicant is a danger to self or the public if authorized to carry a pistol under a permit. Incidents of alleged criminal misconduct that are not investigated and documented may not be considered.
(c) If an applicant is denied a permit on the grounds that the applicant is listed in the criminal gang investigative data system under section 299C.091, the person may challenge the denial, after disclosure under court supervision of the reason for that listing, based on grounds that the person:
(1) was erroneously identified as a person in the data system;
(2) was improperly included in the data system according to the criteria outlined in section 299C.091, subdivision 2, paragraph (b); or
(3) has demonstrably withdrawn from the activities and associations that led to inclusion in the data system.
(d)
If the court grants a petition brought under paragraph (a), the court must award the applicant or permit holder reasonable costs and expenses including attorney fees.
If your appeal is found in your favor, the sheriff gets to pay your expenses. You need to find out what the history has been of the District Court judge overturning the sheriff's office denials. That may also explain the delay in responding. Whoever is reviewing the application / denial may be reconsidering, as if your case if "iffy", they could have a judge bitch slapping them and that really smarts and isn't a good career building move. Plus, they have to answer to the sheriff WHY 3 grand went out to a citizen defense instead of to the annual pig roast and drunken brawl.
How did the sheriff's department receive the denial appeal, did you get a receipt? Cops LOVE to play games.