law enforcement officer
(4) the term “law enforcement officer” means an officer or employee of the Federal Government, or a person authorized to act for or on behalf of the Federal Government or serving the Federal Government as an adviser or consultant— (A) authorized under law to engage in or supervise the prevention, detection, investigation, or prosecution of an offense; or (B) serving as a probation or pretrial services officer under this title;
18 USC § 1515(a)(4)
None identified. Default scope is assumed to be the entire title.