Police believe a motorist stopped and spoke to a teenager sitting on a road shortly before another car hit and killed her.
Jacinta Waipouri, 19, had been arguing with her boyfriend, Mark Tasker, 24, on August 5 as they drove along the Whitford-Maraetai Rd.
They pulled over and she got out, walked up the road, and then sat down in the middle of it. Mr Tasker and their friend, Helen Dando, 24, tried to get her to move when a car hit the two women.
Miss Waipouri died at the scene and Miss Dando was seriously injured.
Yesterday, Counties Manukau police revealed a young man had been on the road shortly before the accident.