THE VICTIMS

- Cindy Low, Kate Goodchild, her brother Luke Dorsett and his partner Roozi Araghi were killed when Dreamworld's Thunder River Rapids ride malfunctioned on October 25, 2016

WHAT HAPPENED

- Two rafts collided on a conveyor when a water pump failed and caused water levels to drop dramatically

- The malfunction was the third that day, and fifth in a week

- The victims' raft was pushed into a vertical position and the victims plunged into the ride machinery causing fatal injuries

RIDE HISTORY

- Police uncovered multiple previous incidents with the ride, including a guest being thrown into the trough in 2004 when rafts collided

- Despite recommendations for a single emergency stop, no single shutdown function was installed

STAFF TESTIMONY

- Dreamworld electricians described the control panel wiring as a "rat's nest"

- Staff insisted the ride was one of the most complex to operate

- The operator in charge on the day was given only 90 minutes of training

- A supervisor said pump failures were frequent in the week preceding the tragedy

- Staff were unaware of the theme park's policy to shut down an attraction after two failures in 24 hours, believing a third was needed for a supervisor to be notified

- Engineering general manager admitted the ride "should never have opened" after the malfunctions

OTHER EVIDENCE

- Government registration of Thunder River Rapids and other rides at the park were more than nine months overdue

- Dreamworld executives announced cutbacks to maintenance and repair spending in 2016 due to falling profits

- Workplace Health and Safety inspectors identified a "litany of concerns' on the ride's maintenance including missing slats on the conveyor belt, excessive corrosion, crumbling concrete and unidentified controls

- Modifications made to the attraction had never been approved by WPHS

WHAT THE VICTIMS' FAMILIES HAVE SAID

- Relatives of two victims said in a statement they held Dreamworld "totally responsible" for the deaths

Australian Associated Press