D.C. Code § 23-1107
It shall be unlawful for a bondsman to enter a police precinct, jail, prisoner's dock, house of detention, or other place where persons in the custody of the law are detained in the District of Columbia for the purpose of obtaining employment as a bondsman, without having been previously called by a person detained or by some relative or other authorized person acting for or on behalf of the person detained. Whenever a bondsman enters a police precinct, jail, prisoner's dock, house of detention, or other place where persons in the custody of the law are detained in the District of Columbia, he shall forthwith give to the person in charge thereof his mission there and the name of the person calling him and requesting him to come to such place. That information shall be recorded by the person in charge of the place of detention and preserved as a public record, and the failure of the bondsman to give that information, or the failure of the person in charge of the place of detention to make and preserve a record of that information, shall constitute a violation of this chapter.
D.C. Code § 23-1107