The US Food and Drug Administration ("FDA") authorised the experimental antiviral drug remdesivir, brand name Veklury, for emergency use against covid-19 in May 2020. By October 2020, it had received full approval. It remains a primary treatment for covid-19 in hospitals, despite research showing it lacks effectiveness and can cause high rates of organ failure.

In mid-February, Beaudoin called for a criminal investigation into the drug, citing data for Massachusetts he estimates remdesivir may have killed 100,000 people in the US. "They know," he tweeted, "or they wilfully refuse to know. Either way, it's homicide."

Using a Freedom of Information Act ("FOI") request, Beaudoin received all the death certificates in Massachusetts, USA, from 2015 to 2022.  He produced graphs from the information he received and found 1,840 excess deaths from acute renal failure from 1 January 2021 to 30 November 2022, which he believes may be due to remdesivir.