CarMax promotes Diane Long Cafritz to chief human resources officer and SVP   RICHMOND, Va, 2017-Apr-14 — /EPR Retail News/ — CarMax, Inc. (NYSE: KMX), the nation’s largest retailer of used cars, today (Apr. 11, 2017) announced the promotion of Diane Long Cafritz to the newly created position of chief human resources officer and senior vice president. Cafritz, 46,…