Reports from French Polynesia say the man who confessed to killing a German tourist Stefan Ramin in 2011 has again been interrogated.
The burnt remains of the tourist were discovered in a remote valley in the Marquesas Islands.
After being on the run for more than 50 days, Arihano Haiti surrendered to police in Nuku Hiva and said he killed Mr Ramin because he had been raped.
Arihano Haiti reportedly also admitted having sexually assaulted Mr Ramin's wife who had raised the alarm about his disappearance.
According to Les Nouvelles de Tahiti, he has again been questioned after a German expertise discredited Mr Haiti's version of events.
The paper says experts studying body tissues found that Mr Ramin's death occurred after he was engulfed in flames.