Brendan Bennetts allegedly searched "best way to dispose of a body" on YouTube the day before he killed his 16-year-old friend Jayde Kendall, his Supreme Court murder trial has heard.
Computer analyst Neil Robertson, who examined Bennett's phone during the investigation, said the YouTube history also showed a search for the word "bullet" among searches for songs and games.
Defence barrister Michael Copley asked Mr Robertson whether he could tell if Bennetts had actually viewed any videos after the search.
"You don't know that he actually looked at anything at all when he typed in 'best way to dispose of a body'?" Mr Copley said.
Mr Copley said: "YouTube contains a wide variety of material doesn't it? Everything from the serious to the silly?"
Bennetts, 21, has pleaded guilty to the manslaughter but not guilty to the murder of 16-year-old Ms Kendall after allegedly picking her up from school in Gatton in the Lockyer Valley in August 2015.
The Supreme Court also heard from a police forensic scientist who examined Ms Kendall's badly decomposed body in farmland near Gatton, west of Brisbane, where it was found 13 days after she disappeared.
Queensland Police Service forensic scientist Sergeant Diane Howard told the court the teen's body had been partially concealed in dead grass, but was still visible.
"I could see her curly, wavy hair outstretched," Sergeant Howard said.
Sergeant Howard said the missing limbs appeared to be as a result of animals in the area, with bone fragments found nearby.
"We searched the area and found bone fragments which would be consistent with scavenging," she said.
Sergeant Howard said Ms Kendall's shirt had been moved to cover her chin.
"This was pulled up to beneath her breast and the buttoned area was covering her face," Sergeant Howard said.
A test to determine if there was any seminal fluid on Ms Kendall's underwear returned negative, but Sergeant Howard said it had been raining heavily and that might have been the reason for the negative result.
The Supreme Court was also shown CCTV footage of Bennetts at a Commonwealth Bank ATM in Gatton's CBD, after he was alleged to have murdered Ms Kendall.
Bennett told police in an interview that Ms Kendall had asked him to withdraw the money from her account.
At the beginning of the trial Bennetts pleaded guilty to manslaughter which was rejected by the crown prosecution.
Recordings of police interviews played to the jury, revealed Bennetts changed his story multiple times about his last contact with Ms Kendall.
In a formal written statement on August 18, Bennetts said he last saw the teen working at McDonalds the day before she went missing.
Bennetts was re-interviewed by police after the statement was given, where he admitted to detectives he picked her up after school.
"Got in the car, went to the water tower to try and talk her down because she was agitated … she was upset, emotional and crying," he told police.
Bennetts told police the pair talked for a while and Ms Kendall told him she needed to get away because she was stressed about school.
"She stopped crying, looked me dead in the eye and made me promise to give her as much time as possible before I talk to you guys," he told police.
"I thought she would be back by now to be honest, but apparently not."
The court also previously heard evidence from an ex-girlfriend of Bennetts about his violent sexual behaviour.