Convicted child sex offender Peter Ellis is taking his nearly 30-year fight to clear his name to the Supreme Court.
Ellis, 61, served seven years of a 10 year jail sentence for abusing seven children at the Christchurch Civic Creche in 1991.
He was freed in 2000 having always maintained his innocence.
The original 16 charges were based on the preschoolers' testimony of ritual abuse and torture.
Three convictions were overturned in 1994 after one of the children said she lied.