London, June 5 : Austrian incest fiend Josef Fritzl, who imprisoned his daughter in a cellar for 24 years and fathered seven kids with her, might never face trial for his evil deeds, it has emerged.

Police officials fear that the 73-year-old brute who has a heart condition – will die in prison before his victims reveal exactly what happened to them.

They say daughter Elisabeth, 42, is still too traumatised to be quizzed, reports The Sun.

And police have been unable to question the three of her seven kids fathered by Fritzl who also lived in the cellar.

Medical experts have warned cops it could be two years before the victims reveal all about the cellar in the Austrian town of Amstetten.

Fritzl is due in court tomorrow for a remand hearing on imprisonment, rape and incest charges. (ANI)