D.C. Mun. Regs. tit. 1, r. 1-1112
Inquiries by the Board are official inquiries by the District Government. All officers, employees, and members of boards, commissions, and councils of the District government are required to respond to questions truthfully, whether orally or in writing, and must provide documents and other matters of official interest when requested by a representative of the Board. No employee shall prevent or prohibit the Board from initiating, carrying out, or completing any investigation within the jurisdiction of the Board.
Because all materials provided during employment by the District government are the property of the District government, an employee must provide all documents produced while on the job to the Board or its investigators as requested.
D.C. Mun. Regs. tit. 1, r. 1-1112