A woman allegedly set up the murder of her boyfriend and posted a video of the dying teenager on Snapchat with the caption: 'That's what happens when you f**k with me'.
Fatima Khan, 20, is accused of encouraging Raza Khan, 19, to attack 18 year-old Khalid Safi in North Acton, west London, on the evening of December 1 last year.
The couple visited the Costa Coffee close to the Tube station shortly after 5pm, with onlookers describing Mr Safi seeming 'happy and smiley'.
But other witnesses later told police there was a 'weird' atmosphere between Khan and Mr Safi, who had argued in the days leading up to the murder, the Old Bailey heard. She denies murder and conspiracy to cause GBH.
Police are still trying to trace Raza Khan and a £5,000 reward for information is being offered by the independent charity Crimestoppers.
Khan denies murder and conspiracy to cause grievous bodily harm. Her trial continues.
