KUALA LUMPUR, April 4 -- A 'critical' witness is set to file their testimony in support of Datuk Seri Najib Razak's judicial review bid to compel the federal government and the Pardons Board to produce a purported "supplementary order" from the previous Yang diPertuan Agong that would see the former prime minister serve his reduced sentence under house arrest.

Najib's lawyer Tan Sri Muhammad Shafee Abdullah confirmed the matter to reporters earlier today after in chambers case management before High Court judge Datuk Amarjeet Singh Serjit Singh.

However, Muhammad Shafee did not disclose the identity of said witness.

In his application for leave to seek judicial review filed on April 1, Najib claimed Al-Sultan Abdullah Ri'ayatuddin Al-M...