Wall of silence
"Can you again live with the fact that because of your silence another innocent child may lose their life?"
Those are the words of Kristina Caesar, whose son was murdered three years ago. His killer has never been charged.
Fifteen-year-old Adam Regis was stabbed to death in Plaistow in east London on March 17, 2007.
"Please break the silence for the sake of your sons and daughters even though it is too late for my Adam."
Today, a conference at Newham Town Hall focused on so-called "snitching". It's a topic I've covered many times before.
Murder investigations particularly into teenage murders often hit a wall of silence.
The reasons given why no one comes forward include peer pressure, negative experiences with police and fear of reprisals.
Yet Kristina Caesar questions whether it is something more. She asks: "What has become of our communities?"