A police officer who attended the scene of a 17-year-old student who was stabbed to death in his home has described it as the worst he had come across.
Sergeant Kee Wong told the jury at Swansea Crown Court he had been "affected" by what he had seen.
Aamir Siddiqi, 17, was stabbed on the doorstep of his home in Roath, Cardiff, in April 2010.
Jason Richards, 38, and Ben Hope, 39, deny murder and attempted murder.
The jury has seen CCTV footage of alleged killers the day 17-year-old Aamir Siddiqi was stabbed to death at his home.
The jury at Swansea Crown Court see footage taken from 120 locations across Cardiff.
Swansea Crown Court has heard that the alleged murder of Aamir Siddiqi was a ‘contract killing’ – but the wrong person was targeted.