D.C. Mun. Regs. tit. 4, r. 4-416
At any time prior to the Hearing Tribunal's rendering of the Final Decision and Order disposing of the complaint, the complainant may request permission to withdraw the complaint from the Commission's administrative process and may request that the Commission dismiss the matter.
The complainant shall notify the Commission in writing of his or her desire to withdraw the complaint and request dismissal, and shall state the reasons therefor with particularity. Prior to the dismissal of any complaint on the basis of the complainant's desire to withdraw it, the complainant shall furnish the Commission with evidence that the withdrawal is not motivated by coercion, misinformation, or bad faith.
If the complaint has been concurrently filed with the Equal Employment Opportunity Commission (EEOC), and withdrawal is sought in order to proceed in civil court, the complainant shall furnish the Commission with a copy of the "Notice of Right to Sue" issued by the EEOC.
Upon receipt of the documentation required by this section for a request to withdraw a complaint, the Commission may dismiss the matter in accordance with § 426.
D.C. Mun. Regs. tit. 4, r. 4-416