The stepson of former prime minister Datuk Seri Najib Razak, Riza Shahriz Abdul Aziz, pleaded not guilty to five charges of money laundering amounting US$248.173mil (RM1.02bil) from 1Malaysia Development Bhd (1MDB) funds at the Kuala Lumpur Sessions Court on Friday.br br The money was allegedly channelled through Good Star Ltd, a company allegedly linked to fugitive businessman Low Taek Jho, better known as Jho Low, the central figure to the 1MDB scandal.