A lawyer who previously advised Michael Cohen, the key government witness in the hush money payment investigation into Donald Trump, has been invited to appear Monday before a Manhattan grand jury that is considering potential charges against the former president, according to a person familiar with the matter.
Robert Costello had advised Cohen before the two had a falling out, and is prepared to offer testimony to the grand jury attacking the credibility of Cohen's statements, according to the person, who insisted on anonymity to discuss secret legal proceedings.
