Gang power play theory in Toronto shootings

Updated The sound of gunfire has become all too common in Scarborough over the last few months.

From ambushes, to drive-by shootings – even a shocking shootout at a neighbourhood barbecue. Toronto Police investigators say they know who’s responsible, and they’re ready to put an end to the violence. But as Scot Urquhart reports, one vital key continues to dangle just out of their grasp: