Rule 5. Initial Appearance
(1) Appearance Upon an Arrest.
(A) A person making an arrest within the United States must take the defendant without unnecessary delay before a magistrate judge, or before a state or local judicial officer as Rule 5(c) provides, unless a statute provides otherwise.
(B) A person making an arrest outside the United States must take the defendant without unnecessary delay before a magistrate judge, unless a statute provides otherwise.
(A) An officer making an arrest under a warrant issued upon a complaint charging solely a violation of 18 U.S.C. §1073 need not comply with this rule if:
(i) the person arrested is transferred without unnecessary delay to the custody of appropriate state or local authorities in the district of arrest; and
(ii) an attorney for the government moves promptly, in the district where the warrant was issued, to dismiss the complaint.