The son of Jane Furlong has today visited the place where his mother's remains were found and he wants answers about what happened to her, police say.

Today police also said, Furlong, a prostitute who went missing from Karangahape Rd 19-years-ago, may have been alive for some days after she was reported missing in May 1993.

Her remains were found on Sunset Beach in Port Waikato last month by a woman walking her dog. Police narrowed down their search to 30 females aged 15 to 25 years old who had been missing for more than a decade, then used DNA testing to identify her.

The officer in charge of the investigation into Furlong's murder said investigators have had reports of sightings of her in Auckland after May 28 1993, the day she was reported missing by her boyfriend Danny Norsworthy.

Detective Inspector Mark Benefield says although Furlong was reportedly last seen by friends on Karangahape Rd on May 26 that year, people should not close their minds to the possibility she was alive after that date.

Benefield also made an appeal for a man only recorded in Furlong's diary as "Tommy" with whom she may have planned to spend a night at about the time she went missing.

However, Jane's son, Aidan Norsworthy, now 20, today visited the site where his mother was found and wants answers as to why his mother was killed and remained hidden for so long.

Benefield said if any of Furlong's clients remember being with her on or after May 26 1993, they should contact police to let them get a clearer picture of her movements after that date. All information will be treated with confidentiality.

The objective was to establish how and at whose hands Jane died and how she ended up buried at Port Waikato.

It was likely more than one person was involved in her disappearance at some stage, he said.

"Nineteen years have passed since she was snatched from her baby son and other family members and it's time now for those who know some or all of what happened to her to front up and tell police."

- © Fairfax NZ News