The woman, 30, appeared in the Waitākere District Court this morning before Judge Brandt Shortland.
She was arrested on Saturday, a day after the fatal shooting of Constable Matthew Hunt in the Auckland suburb of Massey.
A second shot police officer and a bystander struck by a vehicle during the incident remain in hospital.
The woman is charged with being an accessory after the fact to murder.
Auckland's Crown solicitor Brian Dickey said the woman was located after the two police officers were shot following extensive police inquiries and calls for assistance to the public.
The accused's lawyer made an application for interim name suppression for her client, whom she said was potentially in danger after a "barrage of threats" on social media.
It was also argued by naming the woman it would lead to the identification of the alleged gunman, who has interim name suppression.
Dickey opposed the application and said police releasing the woman's name was justified to locate the defendant as quickly as possible.
The man accused of murdering Hunt appeared in the Waitākere District Court on Saturday.
The 24-year-old was granted interim name suppression and was remanded in custody until a hearing in the High Court on July 8.
He is also charged with attempted murder for allegedly shooting the second officer, and driving dangerously causing injury after a member of the public was injured after being hit by the car allegedly used in the getaway.
The names of the second officer shot and the injured member of the public have both been suppressed.
