U.S. Department of Agriculture Inspector General Phyllis Fong had intended to stay after the White House terminated her, saying she believed the administration did not follow proper protocols.

In 2022, the inspector general’s office launched an investigation of Elon Musk’s brain implant startup Neuralink, which remains ongoing, sources said. In recent years, the office has also taken on animal abuse at dog breeders for research labs and the listeria outbreak at Boar’s Head, among other issues.

The USDA Inspector General deals with food safety, audits and investigations of the Agriculture Department and violations of animal welfare laws. The USDA has been one of the main agencies dealing with the outbreak of bird flu, which has spread to cattle and poultry. One person in Louisiana has died from the disease.

Fong has served for over two decades, under four presidents. She was initially appointed by Republican president George W. Bush.

Security agents escorted the inspector general of the U.S. Department of Agriculture out of her office on Monday after she refused to comply with her firing by the Trump administration, sources familiar with the matter told Reuters.