D.C. Code § 22-1005

When complaint is made by any humane officer of the Washington Humane Society on oath or affirmation, to any magistrate authorized to issue warrants in criminal cases, that the complainant believes, and has reasonable cause to believe, that the laws in relation to cruelty to animals have been or are being violated in any particular building or place, such magistrate, if satisfied that there is reasonable cause for such belief, shall issue a search warrant, authorizing any marshal, deputy marshal, police officer, or any humane officer of the Washington Humane Society to search such building or place.