MACC has released audio recordings of several telephone conversations involving former premier Najib Abdul Razak with regard to the 1MDB scandal.
One of the calls was between Rosmah Mansor and her husband Najib on July 27, 2016.
The MACC, which played the recordings to the media today, is confident that the recording is genuine.
In the call, Rosmah berates Najib for looking like a "villain" while then MACC chief Abu Kassim Mohamed looks like a hero.
MACC chief Latheefa Koya said the commission received the recordings from anonymous sources after the new year. Forensics tests concluded that the recordings were authentic and not tampered with.
Speaking at a press conference in Putrajaya today, she said the recordings were revealed to the media as it concerned an issue of public interest.
She added that the recordings would be sent to the police for further action.