Two 27-year-old old men have been arrested on suspicion of manslaughter and kidnap.
A woman, aged 19, has been arrested on suspicion of assisting an offender.
All remain in custody for questioning.
Shortly after 5.45pm on Saturday 20 April 2019, police were called to Bickershaw Lane in Wigan to reports that three cars had collided – a black Volkswagen Polo, a silver Mercedes C220 saloon and a grey Volkswagen Amarok.
Police and Ambulance Services attended but sadly a 34-year-old woman, the driver of the Polo, later died at Hospital.
A 13-year-old girl a 29-year-old man travelling in the Polo were taken to hospital with serious injuries, where they remain in a stable condition.
A 4-year-old girl also in the Polo was taken to hospital for less serious injuries. She has since been released from hospital.
A 20-year-old man who was arrested on suspicion of causing death by dangerous driving remains in police custody in hospital.
The occupants of the Amarok have been traced.
Two men have been charged in connection with the investigation and have appeared at court.