By Asim Yasin/khalid Iqbal in The News, Dec 20, 2023ISLAMABAD: The National Accountability Bureau on Tuesday filed the Toshakhana reference against the former prime minister and his wife Bushra Imran Khan, as co-accused in the Accountability Court in Islamabad, for retaining the Graff Jewelery set gifted by the Crown Prince of Saudi Arabia. The NAB prosecutor, Sohail Arif, and Investigation Officer Mohsin Haroon submitted the reference at the Registrar’s Office. The Director General NAB, Rawalpindi,…