Facebook's "people you know" feature not only digs into your friends and their connections, but also lighter connections in the network. It'll also use your work or education information, as well as location and your Instagram account, to sniff out possible new BFFs... or people who have wronged you. Detective constable Rhiannon Daff said the Facebook tip was "a crucial part of the investigation" and "the final piece of the jigsaw" -- not quite as easy a case as the Lucozade Bandit.