25 U.S.C. § 2803 : US Code - Section 2803: Law enforcement authority

Search 25 U.S.C. § 2803 : US Code - Section 2803: Law enforcement authority

The Secretary may charge employees of the Bureau with law
enforcement responsibilities and may authorize those employees to -

(1) carry firearms;
(2) execute or serve warrants, summonses, or other orders
relating to a crime committed in Indian country and issued under
the laws of -
(A) the United States (including those issued by a Court of
Indian Offenses under regulations prescribed by the Secretary),
or
(B) an Indian tribe if authorized by the Indian tribe;
(3) make an arrest without a warrant for an offense committed
in Indian country if -
(A) the offense is committed in the presence of the employee,
(B) the offense is a felony and the employee has reasonable
grounds to believe that the person to be arrested has
committed, or is committing, the felony, or
(C) the offense is a misdemeanor crime of domestic violence,
dating violence, stalking, or violation of a protection order
and has, as an element, the use or attempted use of physical
force, or the threatened use of a deadly weapon, committed by a
current or former spouse, parent, or guardian of the victim, by
a person with whom the victim shares a child in common, by a
person who is cohabitating with or has cohabited with the
victim as a spouse, parent, or guardian, or by a person
similarly situated to a spouse, parent or guardian of the
victim, and the employee has reasonable grounds to believe that
the person to be arrested has committed, or is committing the
crime;
(4) offer and pay a reward for services or information, or
purchase evidence, assisting in the detection or investigation of
the commission of an offense committed in Indian country or in
the arrest of an offender against the United States;
(5) make inquiries of any person, and administer to, or take
from, any person an oath, affirmation, or affidavit, concerning
any matter relevant to the enforcement or carrying out in Indian
country of a law of either the United States or an Indian tribe
that has authorized the employee to enforce or carry out tribal
laws;
(6) wear a prescribed uniform and badge or carry prescribed
credentials;
(7) perform any other law enforcement related duty; and
(8) when requested, assist (with or without reimbursement) any
Federal, tribal, State, or local law enforcement agency in the
enforcement or carrying out of the laws or regulations the agency
enforces or administers.