Michael Lynch, 17, was jailed for life today and told he must serve a minimum of 15 years for the murder of student Daniel Pollen and an attack on his friend in Romford, Essex, in July last year.
A court heard how the peaceful students never stood a chance in the unprovoked violent attack, which was caught on CCTV.
Video: The shocking scene as a young man is murdered
Daniel Pollen, 20, lived only seconds after his jaw was first shattered after a punch and then a knife driven into his heart. Although the wound was less than two inches deep, it caused massive bleeding and made his death "inevitable", London's Woolwich Crown Court heard.
By the time the young men's three attackers had driven off, the second year Southampton University medical student was almost certainly dead.
His friend Andrew Griffiths, who had been celebrating his 20th birthday, also lay in a pool of blood - his jaw shattered as well.
"The murder of Daniel Pollen and the related attack on his best friend Andrew Griffiths formed a sustained and co-ordinated piece of violence that was as brutal as it appears to have been senseless", prosecutor Christopher Kinch QC told the court.
"We are no nearer any clear explanation for the unleashing of that gratuitous violence on two entirely innocent young men.
"At the end of it Daniel Pollen had been mortally wounded, the knife had gone into his chest and pierced his heart, his friend Andrew Griffiths lay beaten with a broken jaw and wounded with the same knife."
Among those in the dock was 17-year-old Michael Lynch of Stratford, east London, who was just 16 when he launched the frenzied late night knifing in Romford's Brewery Shopping Centre car park on July 8 last year.
Lynch, who was on bail for burglary at the time, pleaded guilty earlier this year to murdering Mr Pollen and wounding his other victim with intent. Alongside him were Timmy Sullivan, 19, from Barking, Essex and Michael Onokah, 25, of Ilford, East London, who were convicted of wounding Mr Griffiths with intent and causing grievous bodily harm to their other victim at a trial last month were cleared of murder.
Following representations from the press, Judge Shirley Anwyl QC agreed an order protecting Lynch's identity should be lifted because of the seriousness of his crimes.
As the crop-haired defendants sat in the dock, surrounded by nine prison officers, Mr Kinch detailed the countdown to Mr Pollen's "chilling" and unprovoked murder.
Mr Kinch told the court that the two victims had spent the evening at the Time And Envy nightclub in Romford with several friends.
Although the three defendants had also been in the nightclub at the time, Mr Kinch said there was no evidence of any confrontation between the two groups.
Mr Griffiths and his friends left at around 2am with most of the group setting off to catch taxis home while he and Mr Pollen went to the car park to await a lift from the Southampton student's sister Kirsty.
By coincidence, two CCTV operators were watching the scene outside the club where crowds were milling around as police dealt with an unrelated incident and noticed the three defendants pulling at a street sign and decided to focus on them.
"That is the reason why we have so much clear and chilling footage of the events that followed," Mr Kinch said.
The cameras were filming as the trio set off through a passageway towards the car park. Seconds later they spotted the two students and launched what was to be a fatal attack. Mr Kinch said: "They were seen chatting together plainly in good humour...and the Crown's case has always been that the events that followed were far too rapid and co-ordinated for there not to have been some communication in those seconds."
Sullivan was seen approaching the pair and lunging at Mr Griffiths, shattering his jaw with a punch.
"Daniel Pollen instinctively reached out but could do nothing to protect his friend as he slumped to the floor," the barrister said. As Sullivan sauntered away, the other two began "circling" Mr Pollen in a predatory fashion.
As Onokah punched him, breaking the young man's jaw, Lynch was seen reaching into his pocket, almost certainly to pull out his knife. The student could be seen with his arms outspread in "a gesture entirely peaceful and non-aggressive".
Seconds later, Lynch delivered the fatal blow. "Mr Pollen was seen holding his chest with his right hand. At that stage, he could not have known it but the knife having pierced his heart, he had but seconds to live," he told the court.
Griffiths was also stabbed moments later. The CCTV showed Lynch lunging four times at him although two thrusts failed to penetrate. "Fortunately for him, he was falling away and collapsing to the ground as the last of those thrusts were being delivered," Mr Kinch said. The three were then seen making off in a car. The entire incident took no more than 40 seconds, with the actual violence taking just half of that. The court was told that the CCTV images helped police quickly identify those responsible and track them to Lynch's home.
But as the officers burst in through the front door they fled through the back. Although the two older defendants were soon arrested, the teenage murderer got away and remained on the run for three days.
Mr Kinch said that the youngster had a string of previous convictions dating back to when he was just 14. In the first he shot an Asian man in the leg with a ball bearing gun and racially abused him.