Posted by 
A 14 year-old girl has been charged with murder after a 24-year-old was allegedly stabbed to death at a caravan park in the Queensland town of Hervey Bay.
Footage obtained from 9News showed the distraught teenager surrounded by detectives as she was taken into custody.
Police allege she murdered 24-year-old Stuart Wallace.
READ MORE: Marathon disaster as Aussie record holder pulls out
Paramedics say he sustained a single stab wound to his back.
He was rushed to hospital but didn't survive.
LIVE UPDATES: Aussie cyclist 'quietly confident' despite tough task
9News understands the 14-year-old accused and her 14-year old friend were at the Big 4 Caravan Park at Point Vernon.
Wallace arrived a short time later.
Acting Detective Inspector Craig Mansfield said there was "some sort of altercation" in a caravan at an annex of the caravan park.
He said police had "more questions than answers" in their investigation so far but that they were confident with the murder charge.
"It's absolutely concerning. It's a tragic event," he said.
Police said the accused's friend, who is now the police's key witness, was known to Wallace, but only for a short period of time.
Police sources have told 9News Wallace is known to authorities.
He had been "transient" and living out of a vehicle.
The teenager will front Hervey Bay Children's Court tomorrow.
Watch every moment, every medal of the Olympic Games Paris 2024 live and free on Channel 9 and 9Now. Plus, every event ad-free and in 4K on Stan Sport.
