The previously unidentified investor Najib was reported to have returned $620 million to the Saudi royal family in 2013 .
No explanation was given as to the reason for the investment or what happened to the $61 million Najib did not return .
The previously unidentified investor Najib was reported to have returned $620 million to the Saudi royal family in 2013 , but no explanation was given as to the reason for the investment or what happened to the $61 million Najib did not return .