SYDNEY, Australia — Cardinal George Pell walked out of prison on Tuesday after Australia’s highest court reversed his 2018 conviction for molesting two choirboys decades earlier — liberating the most senior Roman Catholic cleric to ever face trial over child sexual abuse.

The world may never be able to assess whether the court’s reasoning was sound.

The panel of seven judges ruled that the jury lacked sufficient doubt about the accusations against Cardinal Pell, the former archbishop of Melbourne and treasurer for the Vatican. Jurors, the court argued, ignored “compounding improbabilities” caused by conflicting accounts from the cardinal’s main accuser and other witnesses.

But no one outside the court case can test that comparison. The central evidence — the testimony of the main accuser, on which the case “was wholly dependent,” the judges wrote — has never been released, not in video, audio nor even redacted transcripts.

It is just one glaring example of the secrecy and lack of accountability that have shaped the Pell prosecution from the beginning. No criminal trial in Australia’s recent history has been as high-profile nor as hard to follow and scrutinize.