The father of stabbed schoolboy Damilola Taylor has taken part in an event designed to help children learn about the dangers of knives.
Ten-year-old Damilola was stabbed on his way home from school
Richard Taylor was among the speakers at a workshop inside the Barbican Centre, London, on Sunday.
True stories were used in the hope of deterring children from carrying blades "for their own protection".
Damilola, 10, bled to death after being stabbed on his way home from school in Peckham on 27 November 2000.
Three teenagers are awaiting trial charged with his murder.
Since his death, there have been a series of anti-knives initiatives in Southwark, such as a poster competition and Peckham Academy drama held this summer.
Police have also been running Operation Blunt, to inform youngsters about knives and the dangers of carrying.
The workshop covers "personal, moral and emotional responses" to knife crime.
Sgt Paul Softley, based at Camberwell police station, said: "Young people tell us they feel the need to carry a knife for their own protection.
"This view is challenged in one DVD when they see a boy named Joe who, through a series of bad choices, ends up in prison. They also see his victims."
Speakers also include Harriet Harman, the MP for Camberwell and Peckham, and Scotland Yard's Deputy Assistant Commissioner Brian Paddick.
Police officers used the event to launch an education pack which aims to reinforce the message that it is not "cool" to carry knives.