Disturbing CCTV footage shows a gang of killers laughing and joking in a McDonald's restaurant just minutes after carrying out the fatal stabbing of a teenage boy .
Liam Hunt, 17, was brutally knifed four times and left to die in a pool of blood in an alleyway after being attacked by a group of young thugs on February 14 last year.
A court heard the youngster suffered a seven-centimetre wound from being stabbed in the neck in St George's Street in Northampton and later died in hospital.
Last week five men were convicted for their part in the youngster's death at Northampton Crown Court and will be sentenced at a later date.
Following the case, police released shocking CCTV showing the moments leading up to and after Liam's death.
Footage shows the thugs fleeing from the scene of the attack and the moment one of them buries a knife in a planter and even gleefully re-enacting the attack in the fast food restaurant.
One 17-year-old, who cannot be named, can be seen graphically gesturing to his neck as he mimics the attack on Liam.