Two of Pell's colleagues also say he was never alone at one of the locations where he is accused of committing a sex offence.

Pell, 76, is fighting multiple historical sex offence charges at a month-long committal hearing before Melbourne Magistrates Court that will determine if he stands trial.

His barrister, Robert Richter QC, on Tuesday said a witness who was scheduled to give evidence at the hearing had made a second statement to police overnight.

"We do not know at this stage if charges would be laid or not," he told the pre-trial hearing.

"It's more than troubling, and we would submit that he should not be called at this stage."

Given the man had made the second statement on Monday, the defence needed time to obtain further information, Mr Richter added.

"We have not had any opportunity to do any investigation," the barrister said.

The defence requested the man and his primary police statement be removed from the committal hearing, which the prosecution did not oppose.

Mr Richter also said the defence disputes the man's first statement about Pell's presence at one of the locations where he is alleged to have committed a sex offence.

The cardinal has been charged with multiple historical sex offences involving multiple complainants.

The court has not released any details about the charges.

Two of Pell's colleagues on Tuesday gave evidence about where Pell changed into his vestments with the help of either another priest or an assistant.

"It was not possible for him to be alone at a Sunday Mass. It's simply impossible," Fr Charles Portelli said.

Fr Portelli said it was "utterly impossible" members of the choir could enter the sacristy, a small room reserved for clergy where vestments, altar wine and other church valuables were stored.

The man who looked after the room said it was not possible for choir members to interact with clergy.

"I'm sorry, no way that could have happened," he said.

The hearing before magistrate Belinda Wallington will resume on Wednesday.

Australian Associated Press