The Sensible Sentencing Trust is to launch a campaign for tougher bail laws later this month.
The campaign follows the death of Christie Marceau, 18, who was stabbed to death at her home on Auckland's North Shore in November last year.
The man accused of killing her, Akshay Anand Chand is charged with kidnapping and threatening Ms Marceau.
Despite police opposition, the trust says he has been granted bail.
The trust is demanding changes to the Bail Act as well as accountability from judges.
Spokesperson Garth McVicar says there are a number of liberal-minded judges who are letting violent people out on bail without any repercussions to their careers.
It will launch a campaign called 'Christie's Law' on Monday, 27 February.
Supporters are invited to wear a turquoise coloured top or hat because it was Ms Marceau's favourite colour.