Sources say the charges involved a sum of RM15 million ($5 million) and investigators have traced the source of money to Najib, who himself has been slapped with 42 charges of criminal breach of trust and money laundering linked to the 1MDB scandal.
Stadlen had worked for the UK-based public relations consultancy APCO International, which did work for Najib immediately after he became prime minister in 2009. He later left APCO to work directly for Najib and was part of a large communications network that was outside the official press team in the Prime Minister's Office.