State ethics investigators looking into Attorney General Eric Schneiderman’s office and its conduct in relation to the civil fraud prosecution of business titan Maurice “Hank” Greenberg have apparently expanded the inquiry to Schneiderman’s top deputy.

An attorney for Greenberg and another source confirmed yesterday that the Joint Commission on Public Ethics recently received logs of phone calls between Chief Deputy Attorney General Harlan Levy and Nicholas Gravante, a partner at Boies, Schiller & Flexner. The law firm represents Greenberg. Levy, a former Boies Schiller partner, had several discussions in early December with Gravante, the New York Post reported in February. The Post reported that Levy and Gravante exchanged multiple calls at the same time JCOPE was beginning a probe into a possible ethics violation by the lead prosecutor, Assistant Attorney General David Ellenhorn.

Ellenhorn attracted JCOPE’s attention when it was revealed that, following a Greenberg-related deposition several years ago in Omaha, he accepted a ride home on David Boies’ private plane. Boies is representing Greenberg. JCOPE also is inquiring into allegations that after the plane landed in Westchester, Ellenhorn got a ride to New York City in a limousine hired by Boies, according to David Grandeau, an attorney in Niskayuna working for Greenberg.

Grandeau confirmed that JCOPE had requested and received records indicating that Levy and Gravante communicated several times between Dec. 6 and Dec. 9, 2013. “I have delivered those records to JCOPE,” Grandeau said. “I delivered copies of the phone records they wanted and provided them with a lot of background information on the private jet trip as well as the limo Mr. Ellenhorn took after arriving in Westchester.”

Both JCOPE and the attorney general’s office declined to comment.