Wilson became eligible for parole in December 2008 but the Parole Board ordered he stay in prison until his final release date of September 1, 2012, saying he was likely to reoffend if released.
In a report to the board, Wilson was recorded as saying "I don't give a stuff about it", when asked if he would adhere to a condition that he have no contact with children under 16 upon his release.
The board yesterday released its latest review findings, saying Wilson was at a high risk of reoffending and should remain in jail.
But Mr Williams said that by next September, Wilson would have served his time and he would need the community's support to prevent him from reoffending.
"I think the concerned people should really battle for the mind of this person - to help him get a mental attitude that's healthy. We're not determined enough to help these people get on a straight path."
Wilson has not completed any programmes to stop sexual abuse while in prison.
But Mr Williams said that in spite of requesting to take part in such programmes, Wilson had been denied because of his continued refusal to admit his guilt.
"I think that's wrong. He's there 17 years and he should have had some courses to help him with rehabilitation."
Wilson was receiving support from a Catholic priest, the Prisoners Aid and Rehabilitation Trust, and Mr Williams said if requested, he would also willingly also help Wilson with his rehabilitation.