Shahrol, the 9th prosecution witness, will read about 600 paragraphs spanning 270 pages.
A member of the prosecution team told FMT that Shahrol would likely be in the witness box the entire week as several key documents would be tendered through him as evidence.
Shahrol was 1MDB’s first CEO and he played a pivotal role in its formative years.
Most of the fund’s major deals and borrowings took place during his watch at the sovereign wealth fund.
They included the expensive acquisitions of power assets between 2012 and 2013.
He was thrusted into the limelight after a 2016 damning report by the Public Accounts Committee (PAC) blamed him for the mismanagement at 1MDB.
After four years at 1MDB, Shahrol joined the Performance Management and Delivery Unit (Pemandu) in March 2013 as a director.
He was with Malaysia Petroleum Resources Corporation until last year but is currently unemployed
He is also on the travel blacklist because of the 1MDB probe.
Shahrol was a consultant with Accenture for more than 13 years and at the age of 35, he left Accenture as an executive partner and managing director to join 1MDB.
It was during this time that he met fugitive financier Low Taek Jho, also known as Jho Low.
According to the opening statement read out by ad hoc prosecutor Gopal Sri Ram on Aug 28, 1MDB was originally Terengganu Investment Authority
He said Najib was instrumental in changing its name and exerted influence over the 1MDB board to carry out certain abnormal transactions with undue haste.
The statement said the ultimate aim of Najib was to obtain gratification for himself and an elaborate charade was employed.
It was acted in four phases in which several characters played a part, with Najib in the main role together with Jho Low.
Shahrol is expected to narrate in court events from the time TIA was in existence and the three phases in this case.
Najib is facing 25 charges of money laundering and abuse of power over alleged 1MDB funds in his AmBank accounts.
He is accused of abusing his position to obtain RM2.28 billion in bribes in February 2011 and December 2014.
He is also said to have transferred RM2.28 billion in illegal funds to his bank accounts and to have subsequently used the money.