"We are investigating issuing proceedings against the Melbourne Show and the ride operator. It will be an action in negligence," Munir said.
WorkSafe has determined the ride is safe and given approval for it to re-open.
The news follows a video of the crash surfacing on social media. The man who unintentionally captured the moment Rodden was struck by the roller-coaster says he is having trouble sleeping.
"All of a sudden, I saw someone getting taken up but at the same time I'm thinking 'f***, my sister, my partner," he told 7News.
"But you can see she'd bent down to pick something up. I don't know if it was a phone or what, but she was so fixated on picking it up that she didn't even see the ride at all."
"From our understanding, there was a mobile phone at the base of the Rebel Coaster that she dropped on the ride and she went back to recover the mobile phone," he said.
"Regrettably, she was tragically struck by the cart coming down."