A forensic crash investigator has told the second day of the inquest into the Dreamworld tragedy there were 20 critical seconds after the Thunder River Rapids rafts collided and if the emergency stop button was pressed it may have prevented some injuries.
Senior Constable Steven Cornish told Queensland's Southport Coroner's Court the slower stop button, which takes eight seconds to bring the Thunder River Rapids Ride conveyor to a halt, was pressed 10 seconds after the incident.
Under cross examination he was asked if the emergency stop button was pressed would it have avoided the tragedy which killed Kate Goodchild, Luke Dorsett, Roozi Araghi and former Kawerau woman Cindy Low.
![Dreamworld victims Kate Goodchild, Luke Dorsett, Roozi Araghi and Cindy Low.](https://www.nzherald.co.nz/resizer/v2/HO5XDCWECUBGJ4OBTJJLLHOXIM.jpg?auth=8fd1cb7fd65ebb75fa1e90aa3faa84e168f680b08fbabbdc04087f711f74dc64&width=16&height=13&quality=70&smart=true)
"[It] would not have avoided it," he said.