John McAreavey has spoken out for the first time since it was reported a key witness in Michaela's murder trial was found dead.
43-year-old Raj Theekoy's body was discovered beside wasteground in Mauritius today on Sunday October 3.
Michaela McAreavey was strangled in her hotel room on the Indian Ocean island on January 10, 2011 while on honeymoon with husband John.
The 27-year-old teacher, from Co Tyrone, was married just 10 days earlier and was attacked as she returned to her hotel room - Belfast Live reports.
On Monday morning, John said: "Firstly, let me extend my sympathies to the family of Raj. This is a tragedy for them.
"Now is a time for their mourning and grief and nothing should intrude on that.
"When it comes to getting to the truth about Michaela's murder, nothing has been straightforward in Mauritius and neither the Hartes or myself will be deterred from pursuing justice and truth. Not today, not tomorrow and not ever.
"We will be asking the authorities to assure us that no end will be spared in securing justice for Michaela."
Theekoy was initially provisionally charged with conspiracy to murder.
The case against him was dropped after 77 says in jail and he was granted immunity from prosecution.
