PETALING JAYA - It is impossible for Datuk Seri Najib Tun Razak not to know of transactions related to 1MDB when his signature was on the documents, says Tun Dr Mahathir Mohamad.
The Prime Minister said he could not believe his predecessor's claim that he knew nothing about money from the state fund ending up in his personal account.
"Who wants to believe him (that he didn't know), when he signed (his name)?
"Every bit of money that goes in and out of the first borrowing of RM42bil, all (had) his signature," said Dr Mahathir.
The amount refers to the total debt accumulated by 1MDB, a fund which was, in fact, founded by Najib in 2009.
"If he doesn't know, it must be that he doesn't understand what a signature means," Dr Mahathir was quoted as saying in an interview with the Malay Mail yesterday.
Dr Mahathir described as "ludicrous" for someone to direct RM2bil to be transferred into his account, while refusing to be informed of the transaction.
"This cannot be. Because I have to sign to use the money.
"To use the money, I have to issue cheques. Najib always assumes that people are stupid," Dr Mahathir added.
It was previously reported that about US$700mil (RM2bil) was allegedly misappropriated from 1MDB into Najib's personal account.
In a Reuters report on Wednesday, Najib blamed his advisers and the 1MDB board for keeping the alleged embezzlement information from him.
He said he did not know if hundreds of millions of dollars that moved through his personal account was from 1MDB, and if money from the fund was eventually laundered to acquire assets globally, including yachts, paintings, gems and prime real estate.
To this, Dr Mahathir said the Government had all the information on Najib's alleged involvement in moving the 1MDB money, and that it knew how much money had gone into Najib's account.
On Wednesday, the Prime Minister disclosed that the authorities had "an almost perfect case" against Najib for embezzlement, misappropriation of funds and bribery.
1MDB had fallen RM42bil in debt since its inception in 2009, and Dr Mahathir had been at the forefront raising questions on it over the past three years.