A Melbourne jury has convicted a teenage boy of murder, deciding he meant serious harm against university student Laa Chol when he stabbed her in the chest.
Although he confessed to knifing Ms Chol during a violent scuffle at a party in July last year, the boy denied intending to kill or seriously injure her.
On Friday, the Supreme Court jury unanimously rejected the boy's plea to convict him on the lesser crime of manslaughter, which carries a lighter prison sentence.
The verdict came after jurors spent more than two days deliberating over the boy's state of mind at the time he stabbed Ms Chol, 19, in a "stupid, senseless act", following a trial lasting just three days.
Justice Stephen Kaye remanded the boy, now 18, to be held at a youth justice facility while he awaits sentencing.
The boy, who cannot be named as he was 17 at the time, murdered Ms Chol in the "spur of the moment" after gatecrashing a party at Melbourne's EQ apartment tower.
Ms Chol discovered her phone was missing and kicked the intruders out of the apartment, which she'd rented via Airbnb for a weekend of fun with friends.
During the violent scuffle, part of which was captured on CCTV, Ms Chol was stabbed in the chest in the building's lift lobby, before stumbling back into the apartment and collapsing.
At first Ms Chol's friends thought she was having an asthma attack, but in fact her heart had been pierced with a knife, causing internal and external blood loss.
Ms Chol was already dead by the time paramedics arrived, soaked in blood and surrounded by friends.
Defence lawyer Sam Norton argued during the trial the stabbing did not meet the legal threshold for the crime of murder, as the boy lacked the required intent to seriously injure or kill Ms Chol.
But the jury instead agreed with prosecutor Kristie Churchill, who said the boy didn't need to have premeditated the attack or have a specific motive to still be a murderer.
She noted he didn't strike Ms Chol in the leg or arm but stabbed with "at least moderate" force to penetrate her chest cavity and heart.
The knife used in Ms Chol's murder has never been found.
The boy will return to court on November 18 for a pre-sentence plea hearing.