Rajapaksa sworn in new Chief Justice Mohan Peiris to replace Sri Lanka's first woman chief justice who was impeached by the parliament in a controversial move.
Peiris, a British qualified solicitor who retired in 2011 as the Attorney General was serving as the legal advisor to the Cabinet.
He is being seen as a favourite of the government.
Peiris has lobbied for Sri Lanka during the sessions of the United Nations Human Rights Council in recent years. He is also supervising the implementations of recommendations by Sri Lanka's post war reconciliation commission (LLRC).
Presidential officials said Peiris took over as the new chief justice today after the sacking of Bandaranayake following a parliamentary ratification last week of the impeachment against her.
Bandaranayake's impeachment came despite the Supreme Court's ruling of the process against her illegal.
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She had walked out of the parliamentary investigation citing bias.
National and international rights groups have severely criticised the government of Sri Lanka over the issue.
Rights groups have questioned the legality of the impeachment that has pitted the judiciary against the government.
In keeping with the opposition, Civil society think tank, the Centre for Policy Alternatives filed a fundamental rights petition in the Supreme Court seeking an order restraining Peiris from taking office.
The legal fraternity was up in arms against the impeachment and had vowed not to cooperate with her successor. (MORE)