District of Columbia Code Division V. Local Business Affairs § 32-1331.05. Investigation of complaints.

(1) Enter and inspect the premises or place of business, employment, or work site, and upon demand examine and copy, wholly or partly, any or all books, registers, payrolls, and other records, including those required to be made, kept, and preserved under this subchapter or under any regulation issued pursuant to this subchapter;

(2) Question an employer, employee, or other person in the premises, place of business or employment, or work site;

(3) Require from any employer full and correct statements in writing, including sworn statements, upon forms prescribed or approved by the Mayor, with respect to the payment of wages, hours, names, addresses, and such other information pertaining to remuneration to employees or independent contractors as the Mayor may determine necessary or appropriate; and

(4) Investigate such facts, conditions, or matters as the Mayor may determine necessary or appropriate to determine whether this subchapter or any regulation issued pursuant to this subchapter has been or is being violated.

(c)(1) The Mayor, in the performance of any duty or the execution of any power prescribed by this subchapter, may administer oaths or affirmations, hold hearings, certify official acts, take and cause to be taken depositions of witnesses, issue subpoenas, and compel the attendance of witnesses and production of books, papers, documents, records, and testimony.

(2) In case of failure of any person to comply with a lawful subpoena or of the refusal of any witness to produce evidence or to testify to any matter about which he or she may be lawfully interrogated, the Superior Court of the District of Columbia, upon the application of the Mayor or the Mayor's designee, may compel obedience by proceedings for contempt as provided in § 2-1831.09(e).