Claims of drugs dealt outside school gates - @StephenNolan asks PSNI just how bad is the drugs problem in NI?

Yesterday we heard from a grieving father who lost his son to drugs a year ago and was holding a service to raise awareness for his 'one pill can kill' campaign. William Burns's son Jamie died after taking an ecstasy tablet. That prompted callers to ring in and say that kids are being targeted by drug dealers at schools and today on the front page of the Belfast Telegraph is the story of how a shopper found drug syringes in the toilets of CastleCourt shopping centre. So just how bad is the drugs problem in Northern Ireland? Stephen spoke to Detective Chief Superintendent Tim Mairs, Head of the PSNI's Organised Crime branch.