Speaking to the Bay of Plenty Times yesterday the mother of then 5-year-old girl, who cannot be identified for legal reasons, said she was not interested in commenting, other than to say, "He deserves a bullet".
Police believe a local officer who acted on instinct and hunted Robertson down, finding him and the girl with her pants removed, saved her from a worse fate.
Robertson was jailed in 2006 for eight years after being found guilty of seven charges, including indecently assaulting the girl and attempting to abduct two other children.
On his release in December 2013, he breached his conditions twice in a few weeks and was deemed such a danger that he was to be monitored strictly for a decade, the maximum period of an "Extended Supervision Order".
"I am satisfied that Mr Robertson poses a very considerable risk indeed," Justice Edwin Wylie said in February last year. "I consider that it is likely that he will commit an indecency on a child under the age of 12 years, and that he will abduct a child for the purpose of sexual connection.
"The evidence compels the conclusion that [he] is impulsive, and that he is unable to control his anger and aggression. Mr Robertson has a predilection for, and a proclivity towards, sexual offending. He has shown no remorse ... Indeed, he continues to deny it."
Robertson raped and murdered Mrs Gotingco three months after the supervision order was imposed but yet to be enforced.
Robertson was granted name suppression because of his previous convictions for child sexual offences. His criminal history was not revealed to the jury.
After the jury returned guilty verdicts, Justice Timothy Brewer said there was no reason for name suppression to continue. However, Robertson appealed against that decision to a higher court.
Robertson's High Court trial heard the mutilated body of mother-of-three Mrs Gotingco was found in a suburban cemetery in May last year.
The Crown said Robertson ran her down and broke her leg as she walked home from a bus stop. He threw her into his car and drove her to his nearby home where he raped her then stabbed her to death.
Two days later, police found the body in scrub in Eskdale Cemetery, Glenfield, after a detective decided to check location data associated with the GPS anklet Robertson was wearing.
The trial was told electronic data showed he had been driving around the North Shore on the evening of Mrs Gotingco's disappearance and visited the graveyard only a couple of hours before she was due home. The same device showed he revisited the area early the following morning and officers sent there made the grisly discovery.
Crown prosecutor Michael Walker said the two cemetery visits were important because they showed "the defendant was planning to kill someone".
"His trip to the cemetery was scoping out where to dump the body."
Mrs Gotingco was last seen leaving her workplace, Tower Insurance in the CBD, about 7pm on May 24.
Justice Minister Amy Adams wants to know if there were failings in the way Robertson was monitored - or wider issues in the way offenders are monitored. ""I will have a look to see if there were failings in the way the monitoring was carried, and at the broader policy," she said.
