An x-ray of a "zombie knife" which was plunged so deep into a man's buttocks that it had to be surgically removed, has been released by police.
The victim was stabbed by teenager Aaron Toward-Parker during a skirmish over a friend's girlfriend at a park near Covingham Square in January.
The 18-year-old has been found guilty of wounding with intent to cause grievous bodily harm at Swindon Crown Court.
Wiltshire Police described the incident as "very violent".
Head of Crime Prevention Sonja Leith said Wiltshire Police is committed to educating people, particularly young people, about the dangers of carrying knives.
Toward-Parker had denied wounding with intent to cause grievous bodily harm, claiming the blade went in by accident. A jury took an hour to find him guilty.