The corruption investigator Sam Koim has returned to Papua New Guinea after visiting Australia where he met with Foreign minister Julie Bishop.
Mr Koim briefed Ms Bishop on the situation in PNG after the move by his now disbanded anti-corruption unit, Taskforce Sweep, to recommend the arrest of the Prime Minister Peter O'Neill in relation to a major corruption case.
Mr O'Neill has subsequently discredited the work of the unit, saying it had become politically compromised.
He also criticised Mr Koim for damaging PNG's reputation abroad.
However Mr Koim says he stands by his work in probing high-level corruption in PNG.
On his Facebook page, Mr Koim says he was aware of rumours circulating that he may be arrested for treason on his return to PNG.
While, he has not been arrested, Mr Koim says he would not be surprised if the arrest happened and claims he would be willing to be interviewd by police on the public record.
Meanwhile, Julie Bishop expressed concern over the current turmoil in PNG.