The man, who earlier on Monday was said to be assisting police with their inquiries, had appeared at the Counties Manukau District Court that day. Emergency crews were called to a one-vehicle crash on State Highway 20, near Mangere, at 3.24am on December 26. They found a woman, who died at the scene, while a 20-year-old man was helping with their investigation, a police spokesperson said. Police were appealing for help from the public in relation to the death, including any dash camera footage from motorists. Email newstips@stuff.co.nzPolice have extended their “sincere condolences to the deceased woman’s friends and family at this difficult time”.