THE mother of murdered schoolgirl Tiahleigh Palmer fronted the media this afternoon to launch a new campaign to try and find out who killed her daughter.

Cyndi Palmer kicked off the "Justice 4 Tiahleigh" campaign to try and help catch her daughter's killer.

"This is very important, we need justice for her," she said.

It is the second time Ms Palmer has fronted the media in a bid to urge the public to come forward with any information they may have about the unsolved murder.

Tiahleigh's body was found on the banks of the Pimpama River on November 5, a week after she went missing.

She was last seen alive at 8.10am on October 30, when her carer dropped her off near Marsden State High School.

Today, her mum returned to the school to hand out purple wristbands with 'Justice 4 Tiahleigh' on them.

Detective Superintendent David Hutchinson said it was important for the investigation that the "horrific incident" stayed in the public.

"We are still convinced more than one person was involved," he said.

"Someone out there knows something."

Det Supt said the police had received a good response from the previous public appeal, with about 70 calls to CrimeStoppers.

"We still remain positive" he said.

There is a $250,000 reward and possible indemnity available for the first person to provide information on the murder.

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