Washington State Attorney General Bob Ferguson filed a lawsuit against the Illinois-based Center for COVID Control, joining other states as well as the federal government who are looking into the center for allegedly providing fake tests and other committing other fraud.

CBS News reported that Ferguson’s lawsuit alleges that the center, which runs more than 300 COVID testing sites across the country, “failed to deliver prompt, valid and accurate results” to customers and for allegedly telling employees to “lie to patients on a daily basis.”

“Center for COVID Control contributed to the spread of COVID-19 when it provided false negative results,” Ferguson said in a press release announcing the lawsuit. “These sham testing centers threatened the health and safety of our communities. They must be held accountable.”