More than 30,000 people were listening live as the final occupier in the Malheur Refuge standoff turned himself in.
David Fry, 27, the last of four people holed up in the rural Oregon park’s headquarters, initially refused to follow the rest out.
The national wildlife reserve had been at the centre of a 41-day standoff between an anti-government group, angry about federal land-management policies, and the FBI.
Gregory T Bretzing, the FBI special agent in charge of the Portland division gave details of the investigation.
“Once the refuge has been cleared of hazards the FBI evidence response teams went to the rescue and will begin to document and collect evidence as it relates to potential crimes that were committed by the occupiers while they were on the refuge. […] The Malheur National Wildlife Refuge remains closed and will remain closed for a period of several weeks,” he said.
The surrender followed the arrest of Cliven Bundy, the father of the group’s leaders.
Ammon and Ryan Bundy were detained by the FBI on January 26. In the same operation, their spokesman Robert La Voy Finicum was fatally shot.