Jo Sione-Lauaki and Jared Sione-Lauaki. Jo was found dead on Omamari Beach in Northland on August 2 in circumstances police have described as "unexplained".
The 38-year-old mother of eight had failed to return home the previous night and was reported missing that morning.
The officer leading the investigation, Detective Inspector Al Symonds, said her death was still being treated as unexplained.
The key things police still wanted from the public were any sightings of her car – as well as sightings of anyone on the usually deserted beach in the days leading up to her death.
Symonds said Sione-Lauaki’s car, a black Mitsubishi Outlander, had been parked at the entrance to Omamari Beach some time after 7pm on August 1.
Sione-Lauaki said his wife had told him she was going to the beach late on August 1.
She texted him later that night with the single word, “help”, but the Dargaville dairy farm worker did not see her message until he woke up the next morning.
He phoned and texted her repeatedly and, when there was no response, left work around 9.30am to search the beach with his daughter.
They concentrated on the area north of Baylys Beach, where she usually liked to go, but did not search as far north as Omamari Beach.
Sione-Lauaki told the Herald he hoped people would keep contacting the police with any sightings.
Referring to online speculation about what may have happened, he urged people to “just cut the rumours out” and not assume the worst about him just because he was a gang member.
Symonds said anyone who had seen Jo Sione-Lauaki’s car, or any people in the Omamari Beach area between July 31 and the morning of August 2, should call the police non-emergency line 105 quoting file number 240803/9062.
Photos or videos taken in the area could be uploaded and information could also be passed, anonymously, to Crime Stoppers on 0800 555 111.