An anti- knife crime campaign for London's Metropolitan Police asks Who Killed Deon?

The interactive campaign from AMV BBDO seeks to educate teens about the law of Joint Enterprise, which means, basically, that you can be charged with murder even though you are not the primary offender, or even at the scene of the crime.

The campaign drives viewers to a Facebook page where visitors can watch videos outlining the points of view of each of the six suspects in the case.