Layla Wright’s investigation into the conviction of a ‘killer couple'.
Source: [BBC News](https://www.bbc.co.uk/iplayer/episode/m002x7ml?at_mid=ZSlc3JwfTZ&at_campaign=Killer_Couple_Love_on_Trial&at_medium=display_ad&at_campaign_type=owned&at_nation=NET&at_audience_id=SS&at_product=iplayer&at_brand=m002x7ml&at_ptr_name=bbc&at_ptr_type=media&at_format=image&at_objective=consumption&at_link_title=Killer_Couple_Love_on_Trial&at_bbc_team=BBC)