Politicians of all persuasions, from Julia Gillard and Tony Abbott down, say Catholic priests must not be exempt from having to report child abuse to police should they hear it in the confession of a colleague, reports The Sydney Morning Herald.
It is believed the material sought includes a transcript of evidence by one of Best's victims who has recently alleged Cardinal Pell was present when the boy being raped by Best.
Cardinal Pell has described the victim's claim as "irresponsible, untrue" and said that they were "absolutely denied".
Cardinal Pell, Australia's most senior Catholic, said on Tuesday the church was not interested in denying misdeeds but objected to it being exaggerated in the media.
But Fr Kevin Dillon, of the St Mary of the Angels Catholic Parish in Geelong, said he disagreed with Cardinal Pell and believed the media had played an important role in its focus on child sex abuse in the Catholic Church.
"I believe most Catholics are probably rather grateful to the media for a focus on something which they find enormously shameful and greatly distressing," Father Dillon told ABC Radio on Wednesday.
"I think the media has played a very important and very positive role in all of this."
Protection of confession under heavy fire (SMH)
Pressure mounts to break secrecy of the Confessional (Australian)
Cardinal Pell moves to secure sex trial file (SMH)
Victorian inquiry could be wound up (Australian)
Vic priest speaks out against Pell on media influence (Ninemsn)
Retired bishop labels Cardinal Pell an embarrassment (ABC)