The knife used to kill north-east schoolboy Bailey Gwynne was shown to jurors at the High Court in Aberdeen yesterday.
The four-inch, pointed blade with a brown and black handle was secured in a case before being passed round the seven men and eight women on the jury.
Giving evidence before judge Lady Stacey, crime scene examiner, Jason Parker, described how he had been drafted in to record and recover evidence from the scene following the attack.
The 31-year-old, who is based at Nelson Street police station in Aberdeen, said he also took a number of photos at the school where the attack happened.
These pictures were shown to the jury to allow them to have a better understanding of where the fatal stabbing took place.
In the photos the small corridor where Bailey and the accused fought can be seen, with toilets leading off it.
At the end of the corridor a set of double doors lead on to the area called “the street” where Bailey walked for more than 50 yards following the stabbing.
Other pictures showed the aftermath of the attack with recycling bins and metal benches disrupted by blue and white police tape and a bloodied first aid kit.
Advocate depute Alex Prentice asked Mr Parker if he had noticed anything while searching the waste bins near to where the attack took place.
He said he had, and when asked what it was he said: “A metal object at the bottom of the bins.”
When asked what he recovered he said: “It was a closed knife.”
At this point the jurors were shown the weapon he had found.
Mr Parker said he had also noticed a lot of blood in the area Bailey was allegedly murdered.
He said it looked as if the blood had been “dripping” from him.