Police are confident they have caught Lois Tolley's killers on camera.
Descriptions of four male suspects seen at Tolley's home around midnight on December 10 were released to the public last night, as well as images of two vehicles of interest.
The men are believed to have shot the 30-year-old at point-blank range with a shotgun, as well as stabbing her.
Since the images were released, people have been phoning in tips to the Upper Hutt Police Station.
Detective Senior Sergeant Glenn Barnett said the response was positive.
''They're giving information about the vehicles, vehicles that they may have seen similar to the ones we're after in and around the area.
''We're following all these up to see whether we can rule the vehicle into the inquiry or whether we can rule it out.''
Barnett said a large amount of CCTV footage was left to sift through.
``We're confident, now that we've started to review all the footage that we've downloaded, that this has captured our offenders and the vehicles that they've used.''
Barnett said one of the four men of interest stopped outside the address and was visibly upset.
He said the man was heard swearing and yelling out ``Oh my god, what have we done?''
``They've obviously realised that things have gone out of control, gone too far,'' Barnett said.
``They may have not been the person with the firearm, that person can come forward to the police in confidence.''
He said it was only a matter of time before one of the four suspects cracked.
''The death of any person is a tragedy. The way this killing unfolded is an execution.
''Four people have gone to that address and those four people won't be keeping it to themselves.''
Tolley was killed early on December 10.
Barnett said although the offenders were still on the loose, the public could be reassured of their safety.
``We don't think it was a random attack. We don't think that there is a group going around doing this and endangering the community.''
He said police would spend the weekend combing through the CCTV footage they had collected.
