Australia’s highest court on Thursday said it will deliver a verdict at a later date on whether to overturn the convictions of the most senior Catholic to be found guilty of child sex abuse.

Cardinal George Pell’s lawyer, Bret Walker, told the High Court that if it found a lower court had made a mistake in upholding Pell’s convictions, he should be acquitted.

Prosecutor Kerri Judd told the seven judges that if there were a mistake, they should send the case back to the Victoria state Court of Appeal to hear it again.

Otherwise, the High Court should hear more evidence and decide itself whether the convictions against Pope Francis’ former finance minister should stand, Judd said.

Pell is one year into a six-year sentence after being convicted of molesting two 13-year-old choirboys in Melbourne’s St. Patrick’s Cathedral while he was the city’s archbishop in the late 1990s.

The 78-year-old cleric’s two-day hearing that ended on Thursday could be his last chance of clearing his name.

Pell was largely convicted on the testimony of one of the choirboys, now in his 30s with a young family.

He first went to police in 2015 after the second victim died of a heroin overdose at the age of 31. Neither can be identified under state law.

Judd told the court on Thursday that the surviving victim’s detailed knowledge of the layout of the priests’ sacristy supported his accusation that the boys were molested there.