Two teenagers were acquitted of involvement in the lethal killing of Yousef Makki in a street in Cheshire.
17-year-old Yousef was stabbed with a knife in March after quarreling with a friend in the village of Hale Barns in Cheshire.
At the Manchester Crown Court, a jury declared Boy A not guilty of his murder and not guilty of an alternative manslaughter charge.
A second boy, known as Boy B, was found not guilty of falsifying the course of justice, and not guilty of plotting to raid.
Both were also relieved of the conspiracy to commit a robbery in the run-up to Yousef's death.
Boy A previously admitted lying to the police on the spot and pleaded guilty to misrepresenting the course of justice.
None of the defendants can be named because they are under 18 years old.
Yousef came from an Anglo-Lebanese family in Burnage and had received a scholarship to the prestigious Manchester High School. He wanted to become a cardiac surgeon.
During a four-week trial, the jury heard that the defendants had a "double life" out of their family and background. Alastair Webster, Boy A's lawyer, called her "middle class gangster."
The court heard that the stinging was an "accident" when all three "idiotic fantasies" gave in and published videos on social media that made threats and posed with knives.
Young A did not plead guilty, claiming he defended himself.
After the verdict was pronounced, Boy A blew his cheeks and closed his eyes before being embraced by his tearful family.
But in the public gallery, Yousef's father screamed with rage and the judge had to clear the courtroom.