The recent search of a Dallas intellectual property lawyer’s $1.4 million home led FBI investigators to set up a special procedure to protect the attorney-client privilege. That’s according to an April 4 search warrant related to an FBI investigation into allegations that Erika Perdue, the wife of attorney Mark D. Perdue, transported, received and possessed child pornography.

Paul Coggins, a former U.S. attorney for the Northern District of Texas, says FBI agents must take special precautions when investigating a lawyer’s computer so they don’t violate any clients’ attorney-client privilege.