Nev. Rev. Stat. § 289.250
1. The following persons have only those powers of a peace officer necessary to enforce the provisions of the laws of this State respecting forest and watershed management or the protection of forests and other lands from fire:
3. An arson investigator designated as a peace officer pursuant to:
(b) Subsection 3 of NRS 266.310,
has the powers of a peace officer.
(Added to NRS by 1993, 2522; A 2011, 723)