AN inquiry into suicides among victims of sexual abuse by Catholic priests and brothers in Victoria would achieve little, a Catholic bishop says.

Police investigating the case of convicted pedophile Brother Robert Best believe at least 26 victims of sexual abuse at schools in which he taught have committed suicide.

One of the investigating officers wants a parliamentary inquiry to investigate the deaths.

"If it helps the victims I'd be more than happy for it to go ahead," Bishop of Ballarat Peter Connors told AAP.

"I don't think they'll learn very much more ... I'm convinced we've done the best we can in more recent years."

Best, who taught at schools throughout Victoria, including Ballarat, will be sentenced on Monday after pleading guilty to 27 charges of abusing 11 boys between 1969 and 1988.

Best was principal at St Alipius primary school in Ballarat at the same time convicted serial pedophile and priest Gerald Ridsdale was the school chaplain.

But Bishop Connors on Tuesday said not even revelations from Detective Sergeant Kevin Carson that 26 young men had killed themselves after being abused by priests and brothers in Ballarat convinced him that more would be learnt from an inquiry.

"I think we've learnt a lot of things about what is appropriate behaviour and what's not appropriate behaviour," Bishop Connors said.

"I think people are very well informed nowadays as to what's inappropriate approaches from a male."

While conceding the abuse of children was wrong, he said that in the past it had not always been clear to everyone what was appropriate and inappropriate behaviour.

"In the past a lot of ignorance was there on the part of lots of people. Parents didn't understand, sometimes bishops didn't understand. We have no excuse now."

As to whether there was an excuse when Ridsdale and Best were abusing boys, Bishop Connors said he did not know.

Among the charges laid against Best in Victoria's County Court last month were details of him raping a nine-year-old boy in his office.

The court heard that after Best raped him, the boy thought he was going to die and blacked out.

Bishop Connors said in the past 14 years he had spoken to more than 30 victims of Ridsdale and other priests in the Ballarat diocese.

But he said none had told him they were also abused by Best.

"I can't remember them saying they were victims of Brother Best as well," he said.

The bishop said he had no reason to meet Best's victims "because he being a Christian Brother, I'm not responsible for him."

Yet he conceded that some of Ridsdale's victims he had met could also have been abused by Best, because they were both there at the same time.

Bishop Connors says the church has paid some victims far more than the $70,000 the Archdiocese of Melbourne says should be paid for the worst cases of child assault.

Others have been paid less but overall victims had received "a considerable amount".

He is now waiting to see if any of those victims will come forward in two civil compensation cases set to be mounted against Best and whether the Catholic Diocese of Ballarat will be named in the actions.