For more than a decade, West Africa has been in the grip of an opioid crisis. Illegal, addictive, dangerous pills are sold on the streets. But who’s making these tablets? Who’s packaging them to look like medicines? And who’s shipping them into Africa by the container load? #BBCAfricaEye and #BBCEye Investigations trace the opioid route back to India — and go undercover to expose some of the men profiting from other people’s misery.