I do not believe he is guilty. This article gives some insight into the accusations.
https://www.firstthings.com/web-exclusives/2017/07/the-case-against-cardinal-pell
From your article:
>>> Pell responded to the prosecutors’ questions with a frankness that bordered on heedlessness. He admitted that in 1974, when a boy spoke vaguely to him of the pedophilic behavior of a Fr. Dowlan of the Christian Brothers, Pell did not inquire further or intervene. Asked by the prosecutor to explain his inaction, Pell was blunt: The boy “wasn’t asking me to do anything about it.” <<<
Sorry, by his own words he was NOT innocent.
Inaction in the face of evil is complicity.