Sofia Rini Buyong also appears to defend Shamsul Iskandar Mohd Akin, saying he gained nothing from issuing such letters as he was simply following an order from his boss.

Mahajoth Singh was told to appear before MACC on Sunday morning, a move condemned by lawyers as unlawful and a breach of client confidentiality.

Drama unfolds as the Prime Minister's Office gets entangled in one of the most serious graft scandals in recent years.

This comes despite the agency saying the businessman would only be questioned next week.

This follows the emergence of a second video showing a woman stating that the MACC chief had always known about a plot said to be orchestrated by the prime minister and his aide to record incriminating videos of Sabah politicians.

A new round of criticism targets Azam Baki, whose term as MACC chief was extended three times by the Anwar Ibrahim administration.

Muda slams the decision, saying the embattled MACC chief is trying to survive by pleasing the prime minister.

A six-page report submitted to the Human Rights Commission lists a series of actions by Anwar Ibrahim, MACC and the police that violate due process and rule of law.

Chief among them is that despite calling her a 'flight risk', MACC did not pursue her when she failed to turn up on April 9.

Lawyer for the whistleblower behind damning videos implicating ruling Sabah politicians says a much wider network of people is involved.

This comes days after Prime Minister Anwar Ibrahim's controversial move to maintain Azam Baki as the anti-graft body's chief.

They say Azam Baki's statement is political posturing in line with Anwar Ibrahim's repeated attacks on the former finance minister.