Ms Neailey said if the murderer applied to be released again the family would “have to go through all of this again”.
“He’s never once apologised,” she said.
“When I wrote to the Parole Board I said I couldn’t save my child but I hope to god I can save other children and stop him being released.
“I’m praying he never gets out.”
Wesley was missing for a month before his body, partially enclosed in plastic bags, was found dumped on a grass verge in Healey, Northumberland.
McKilligan was jailed for the killing in July 1999, but his conviction for rape was quashed at the High Court in 2000.
This means he will not be put on the sex offenders register if he is eventually released.
