A woman who was sexually abused as a child by the paedophile who killed Bondi schoolgirl Samantha Knight has told a judge he will be a danger to the community if he's released.
"We are not physically safe if he is released - our children are not safe and our minds are not safe," Lisa Giles said in the NSW Supreme Court on Tuesday.
"This is not a man who will fade into obscurity and potter humbly around his garden."
Michael Guilder, now 68, pleaded guilty in 2002 to the manslaughter of nine-year-old Samantha Knight.
His 17-year jail term expired on June 6 but a 28-day renewable interim detention order was imposed to halt his release.
NSW Attorney-General Mark Speakman is now seeking a one-year detention order and a subsequent five-year extended supervision order.
When Guider was sentenced for Samantha's death, he was already serving time for numerous sex offences against more than a dozen other children between 1980 and 1996.
He had a well-established method of drugging children with sedatives to enable his sex abuse.
Because it is a civil matter, Guider is not required to be present and chose not to attend Tuesday's hearing.
Ms Giles read out a lengthy statement detailing the terrible impact Guilder's abuse had on her. She revealed his crimes to her mother almost 33 years ago.
"He's not a one-trick pony and he's not finished yet," she said.
Guilder had infiltrated and manipulated her family and his long-term project "was me".
"His tentacles have such insidious reach," she said.
Careful and considered plans must be made if he is released, including restricting and removing "physical tools" - such as cameras and access to the internet - from his reach, she said.
Michael Knight, Samantha's uncle, presented a card to the court which his niece had given to her grandfather.
Mr Knight said he loved her inscription of: "To Bill, love from Samantha, I hope you have a nice day and a nice day for the rest of the week."
If she had lived Samantha would now be 42.
Samantha Knight’s killer never revealed what happen to her body
When she died she had a lot of life ahead of her, given her great grandmother had just died at the age of 101 and her grandmother was now aged 83.
Guider has never revealed what he did with Samantha's body.
Mr Knight said he didn't want her killer going back to claim her remains, wherever they were, as some sort of trophy.
Samantha's mother Tess Knight also read a victim impact statement to the court.
The hearing is continuing before Justice Richard Button.
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