Lawyers for Rep. Eric Swalwell demanded Monday that FBI Director Kash Patel immediately end any effort to release records from a decade-old investigation involving the California Democrat and a suspected Chinese operative that resulted in no criminal charges.

The cease-and-desist letter from the attorneys advises Patel that he would run afoul of both federal law and longstanding Justice Department policy if he moves forward with releasing records from the FBI’s investigative file.

It seeks a response from Patel within three days confirming that he will comply with the demand, and warns that any further effort to publicize the files will result in legal action.