Two 19-year-olds, Alex Macdonald and Charlie While, bludgeoned a homeless Romanian man to death with a meat cleaver and fence post then burnt their clothes to hide the evidence.
Both of them were found guilty of manslaughter but neither was in the dock to hear the verdicts after refusing to leave their prison cells.
According to reports, Macdonald beat the 21-year-old up to 20 times with the piece of wood while White struck him six or seven times with the cleaver.
However, White claimed Macdonald later confessed to being the one who killed the Romanian, saying he repeatedly hit him 'cos it was funny'.
CCTV footage showed them later burning their clothes in a park to hide the evidence.
Macdonald also sought to blame a third defendant, 20-year-old Jimmy Buckley.
He told the jury at Maidstone Crown Court in Kent that Buckley confessed to 'finishing off' Sirbu.
However, before their trial got underway Buckley was deemed mentally unfit to enter a plea to murder. The jury therefore found he 'did the act' as opposed to guilt. All three will be sentenced on Tuesday.
Both Macdonald and White have previous convictions for violence and admitted they were wanted by police for failing to comply with court orders at the time of the murder.
Sirbu's battered and lifeless body was discovered in the Loose Valley Conservation Area of Maidstone Kent, by a dog walker on the morning of May 7 last year.
He had been living rough in a tent for about two weeks before he was brutally killed.
He suffered 28 injuries in total, including multiple head, facial and ribs fractures.