A new government headed by veteran politician Mahathir Mohamad, now aged 95, came to office on a wave of public anger, and re-opened investigations.
Najib was hit with dozens of charges, and his first trial over the scandal finally started in April last year.
But in February, the reformist alliance collapsed after bitter infighting, and a new coalition that included Najib's scandal-plagued party seized power.
There were concerns this could impact Najib's trials — particularly after 1MDB-linked charges against Riza were unexpectedly dropped in May.
But those fears proved unfounded after a judge Tuesday found Najib guilty of all seven charges in his first trial linked to 1MDB. He could now face decades in jail.
The case centred on allegations that 42 million ringgit ($9.9 million) was transferred to the 67-year-old's bank accounts from SRC International, a former unit of the fund.
His lawyers insisted he had no knowledge of the transfers and claimed that Low was the true mastermind behind the scam.
But Judge Mohamad Nazlan Mohamad Ghazali said the idea that Low had tricked Najib was "far-fetched", and also dismissed the argument the ex-leader believed the money in his account was a donation from Saudi royalty.
It is not the most significant of the trials he is facing. That one began in August last year, with Najib accused of illicitly obtaining 2.28 billion ringgit ($535 million) from 1MDB.
(Writer & Editor: Agence France-Presse)
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