Victims' advocacy group Broken Rites Ridsdale has previously said the devious predator could have abused as many as 1000 children.
Victorian County Court Judge Irene Lawson said Ridsdale abused his position of trust and exploited young and vulnerable victims for his own sexual gratification.'Your actions were violent and abusive.
Written complaint about offending while in Horsham April 1988 - Steps down from parish work June 1988 - Suspended for 12 months1989-1990 - Residential program in New Mexico.
The former Catholic priest has been in jail since 1994, serving an effective total sentence of 28 years with a 25-year non-parole period for similar offences.
Defence counsel Tim Marsh agreed the offending was unprecedented but asked Judge Irene Lawson not to add to Ridsdale's current sentence or earliest possible parole date of April 2019.
'(The girl's) father carried her to the confessional booth and took her clothes off her then carried her to the altar and lay her down,' he told the court.
The court was told that Ridsdale then indecently assaulted her before saying: 'Jesus died for our sins so we could be forgiven and if I confess to this sin I might be forgiven.' 'Then he kissed her on the cheek,' Mr Mc Williams told the court.
Ridsdale told another of his victims that 'it's our little secret', Mr Mc Williams said.'Ridsdale told him: 'Don't tell your mum and dad or your dad could die'.' Judge Lawson agreed Ridsdale's case was the worst example of child sexual abuse ever dealt with in Victoria.
His crimes took place over such a long period of time, involved so many people and destroyed so many lives that the interests of justice demand a sentence that could properly be called unprecedented, crown prosecutor Jeremy Mc Williams said.'It is hard to imagine a man who has had a more devastating effect on those who have had the misfortune of coming into contact with him,' he told the Victorian County Court in the trial.'He has preyed upon the most vulnerable of the vulnerable, seeking out victims for whom their families are already in trauma and tragedy, and using that trauma and tragedy to advance his own criminal pursuits of gratification among children.'It must be among the worst offending these courts have had the misfortune to deal with.'Unprecedented offending demands an unprecedented sentence.'Ridsdale used his position as a parish priest to befriend the children and their devout Catholic families in parishes in western Victoria, telling some of his victims 'it's our little secret' and one that 'it's part of God's work'.
Ridsdale spent three decades sexually abusing vulnerable children in unprecedented offending which 'demands an unprecedented sentence', a prosecutor argued earlier this month.
Crown prosecutor Jeremy Mc Williams recounted that in one particularly henious example in 1974 a 10-year-old girl was woken up by her father, while Ridsdale waited in the hallway, and driven with the priest to the church.
Panics and leaves overnight after a woman says there is talk he has been interfering with boys and police are making inquiries.