It will be headed by Superintendent Yaswant Callee from the central criminal investigation division, a lawyer for the McAreavey family confirmed.
Dick Ng Sui Wa, who represents Mrs McAreavey’s widower John, said: “There will be a new police team set up. They are taking it from zero.”
Mrs McAreavey, 27, from Co Tyrone, was killed in her room at the Legends Hotel in Jan 2011.
Earlier this month, two hotel workers were found not guilty of her murder.
Three senior officers will be involved in the inquiry, which follows calls for a new trial from Irish politicians. Mauritian prime minister Navinchandra Ramgoolam has given assurances that fresh experts would examine the case during a meeting with the Irish ambassador to the country, Brendan McMahon, in the capital, Port Louis.
Tánaiste Eamon Gilmore said concerns of the families and Irish authorities over the publication of photographs of the newlywed as she lay dead in a hotel were made clear.
The ambassador told the prime minister and the Mauritian foreign minister Arvin Boolell that the McAreavey and Harte families have been deeply distressed and hurt by the publication in the Mauritian Sunday Times.
Appointment of a new police team and a judicial inquiry follows a decision toallow Northern Ireland’s attorney general to examine papers from the trial.
Legends hotel workers Sandip Mooneea and Avinash Treebhowoon were cleared of the murder by a jury at the Supreme Court in Port Louis.
The Department of Foreign Affairs remains in close contact with the McAreavey and Harte families offering consular support and advice.