LAHORE: Special Assistant to Prime Minister (SAPM) on Accountability Shahzad Akbar said the challan submitted by Federal Investigation Agency (FIA) against Pakistan Muslim League – Nawaz (PML-N ) leaders Shahbaz Sharif and Hamza Shahbaz in the Ramzan Sugar Mills money laundering case consists of more than 4,000 documents and 100 witnesses. Deeming Shahbaz Sharif the ringleader of money laundering group,