Gina Allen spoke with The Daily Advertiser on the final day of the inquest into Braydon Worldon's death. On behalf of the family, she addressed her grandson's killer directly.

"If your child or grandchild was killed traumatically and left on the side of the road, how would you feel?" Ms Allen asked.

"Our family has suffered ... we have lost someone very special for us."

Ms Allen said Braydon was given less respect "than a kangaroo on the road", and that's something the family cannot fathom. She said Braydon was a "beautiful soul".

"I have never seen a bond between a mum and child as I have with Crystal and Bradyon," Ms Allen said. said. "It was almost like they were soulmates, and Crystal was a great mum. She gave him so much love."

Ms Allen remembered how he would always make the family laugh and happily allow his cousins to play dress-up with him.

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She also spoke about how since Braydon's death, the family have been contacted by his fellow school students who shared stories of his kindness.

"The thing is, he looked after the underdog, and he would risk himself to make sure the other person was OK," Ms Allen said. "He was just a special boy."

Ms Allen thanked Detective Senior Constable Stanley Wall and the police for their efforts and begged the person responsible to come forward.

Deputy State Coroner Elaine Truscott handed down her findings on Thursday after two days of hearings.

She referenced an expert's opinion that the collision force was so "great and sudden" that it caused "catastrophic" skull, thoracic and cardiac injuries.

Magistrate Truscott found that he had died from multiple blunt force injuries when he was struck by a medium to heavy rigid, or similar, vehicle.

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She said it was not possible to determine where Braydon was when the vehicle came around the corner.

"Whether Braydon was moving and/or miscalculated the proximity of the vehicle is possible given that he had been drinking alcohol," Magistrate Truscott said.

"That he had interfered with Mr Worldon's (his grandfather) letterbox is suggestive that he was acting somewhat impulsively and possibly recklessly.

Such distractions and inhibitions could have contributed to Braydon being inadvertently in an unsafe position on the road."

Magistrate Truscott said such speculation does not help the family cope with his "premature death". But what would assist is the driver coming forward.