KEY POINTS:
Police investigating the murder of a Christchurch sex worker want to talk to three people seen in the area shortly after they believe she was killed.
Ngatai Lynette Manning, also known as Mellory, was found by a kayaker in the Avon River, near Dallington Terrace, east of the city centre, about 6.50am on Friday.
She suffered extensive injuries and was believed to have been dead before entering the water.
Police have confirmed they are looking for two weapons.
Another client who was with Ms Manning before she was murdered had come forward to police and helped narrow down the time of the attack, said Detective Inspector Greg Williams.
Ms Manning was with that client until around 10.20pm and was picked up by the next client at around 10.35pm, he said.
The person who picked her up at that time had not come forward to police.
Police would like to talk to that person, said Mr Williams.
The last text message Ms Manning sent was at 10.43pm.
Her watch had stopped about 10.59.
People travelling on Dallington Terrace around 11.10pm saw a white saloon vehicle parked on an angle on the grass between the river and road, said Mr Williams.
A witness also saw a young male, in his mid 20s with light brown hair, walking along with his hands in his pockets .
A larger car like a four wheel drive or ute was also seen, with two males standing beside it parked close.
"One of the males is described as wearing camo patterned knee length shorts. We would like to hear from those people as they might have seen something," said Mr Williams.
He said the offender had used a car to pick Ms Manning up.
"I would expect that they have spent sometime in and around the area prior to picking Mellory up and may well have been there leading up to last Thursday."
After the event the offender may have stopped using the vehicle for no reason.
"They might have asked a friend or associate to store it. They might have altered it or changed the tyres. Obviously they were out and about at the relevant time and this might all add to the picture."
Anyone who might have any suspicions about anyone should contact police.
"We will ensure your confidentiality," said Mr Williams.
- NZPA