DAP MP Ramkarpal Singh riled up Opposition MPs in the Dewan Rakyat on Wednesday when he asked former Prime Minister and Pekan MP Datuk Seri Najib Razak to explain his alleged involvement in the 1MDB scandal which earned him the “Malaysian crook” moniker. Ramkarpal also asked whether Najib would be investigated over a letter allegedly written by the Prime Minister's Department to the US Central Intelligence Agency (CIA) five days before GE14, appealing for Washington’s support.