According to documents reviewed by Reuters, the federal investigation was opened in recent months by the US Department of Agriculture’s inspector general at the request of a federal prosecutor. The inquiry focuses on violations of the Animal Welfare Act, which governs how researchers treat and test some animals.

See Also: Neuralink Progress on Brain Implant to be Showcased on Halloween: Elon Musk In all, the company has killed about 1,500 animals, including more than 280 sheep, pigs and monkeys, following experiments since 2018. The sources characterized that figure as a rough estimate because the company does not keep precise records on the number of animals tested and killed. Neuralink has also conducted research using rats and mice. The total number of animal deaths does not necessarily indicate that Neuralink is violating regulations or standard research practices. Many companies routinely use animals in experiments to advance human health care. They also face financial pressure to quickly bring products to market. The animals are typically killed when experiments are completed, often so they can be examined post-mortem for research purposes. The US Food and Drug Administration is in charge of reviewing the company’s applications for approval of its medical device and associated trials. The company’s treatment of animals during research, however, is regulated by the USDA under the Animal Welfare Act. Anyhow, Musk and other Neuralink executives did not respond to requests for comment. Check also: Will Apple Remove Twitter From App Store? Musk isn’t Happy