WITHOUT a quiver in his voice or a moment's hesitation Warrick David Lindenberg admitted he murdered Brassall teenager Shaune Gibson.
Lindenberg, 29, formally pleaded guilty at the Brisbane Supreme Court on Tuesday to Mr Gibson's murder and two counts of interfering with his corpse.
Dressed in a dark suit, with a bright blue tie and blue sneakers, his long hair tied in a ponytail and the side of his head shaved, Lindenberg stood up and answered "guilty" when the charges were laid out before him in court.
The court heard on August 9, 2012, Lindenberg killed Mr Gibson and then improperly dealt with his corpse, before again interfering with Mr Gibson's dead body on August 14, 2012.
The 19-year-old Mr Gibson was missing for six weeks in 2012 before Lindenberg and two others were charged with his murder.
Police found Mr Gibson's body buried in a shallow grave on Balaam Hill Rd in Churchable, 21km north of Gatton.
When Justice Martin Burns asked Lindenberg if he had anything to say he simply replied: "No thank you, your honour."
Lindenberg will be sentenced after the trial of co-accused Valerie Jeanette Mullins, 45, takes place. It is scheduled to begin later this month.
The court heard a second co-accused, a girl who was 16 years old at the time of Mr Gibson's death and thus cannot be identified, is unlikely to proceed to trial.
Crown prosecutor Michael Byrne said an application had been made which "frankly has some merit" and he no longer expected her trial to take place.
Lindenberg was remanded in custody until his sentence date.
He is facing a life sentence with a minimum 20 years before he is eligible to apply for parole.
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