A teenager who stabbed to death a boy (14) e-mailed pictures of the body to an online acquaintance, a court has heard.
Lewis Daynes (19) communicated with two of Breck Bednar's friends after he killed the boy - claiming he stabbed him during a struggle and he was dead.
Daynes then sent three images of Breck's body to an online acquaintance before calling emergency services.
Following his arrest, computer engineer Daynes said: "I should have known better than to go for an artery on a friend."
Daynes has pleaded guilty to murdering Breck, who was found with a fatal neck wound at a flat in Grays, Essex on February 17th 2014.
He is due to be sentenced at Chelmsford Crown Court later.
Mrs Justice Cox has lifted reporting restrictions which covered five other counts Daynes faced - including four counts of sexual offences relating to another victim and one of possessing indecent images. Daynes has denied these offences.
Prosecutor Richard Whitham QC said there was no longer a realistic prospect of a conviction for these counts given the conviction for murder and the charges were dropped.
Family members said Mr Breck, from Caterham in Surrey, had left home after arranging to meet a friend online.
Since his death his mother, Lorin LeFave, has launched the Breck Bednar Memorial Foundation to help raise money and awareness to help protect children.
"I'll never stop missing my Breck," she said.