Philippe Bianchi, the father of the late Formula One driver Jules Bianchi, has vowed to fight on in his bid to see someone held to account for his son's death.
Jules Bianchi died in July, having been in an induced coma following an horrific crash at the Japanese Grand Prix in October 2014.
The International Automobile Federation (FIA)'s investigation into the accident concluded that a combination of wet track conditions, the speed of the Frenchman's Marussia car and the presence of a recovery vehicle on the Suzuka circuit combined to cause the tragedy.
Bianchi's father, though, is not satisfied with the findings, questioning the validity of an enquiry mounted by the body that governs world motorsport.
"The investigation was revealed to the media without a word to Jules' memory, and the conclusions shocked me because it concerns the same persons who did the investigation, the people from FIA," he said in an interview with French motorsport magazine Auto Hebdo.
"Is there any conflict of interest? Can you be the judge and the jury?
"The investigation is one thing; it gave one point of view. The rights questions to ask and the true answers are something else.
"I said it before and I say it again, there are some persons responsible and they will pay for that, one way or another. It's clear and accurate.
"I lost Jules and I will never get him back, so I have nothing left to lose, except his memory and the respect that we should have for him. So I will fight for him with all my strength, and with all the people around me."
Asked if he had access to information contradicting the outcome of the FIA investigation, Philippe Bianchi said: "Yes, my lawyers are dealing with it."