Warning: This article contains details about sexual abuse Specialist online investigator Greg Squire had hit a dead end in his efforts to rescue an abused girl his team had named Lucy. Disturbing images of her were being shared on the dark web - an encrypted corner of the internet only accessible using special software designed to make owners digitally untraceable. But even with that level of subterfuge, the abuser was conscious of "covering their tracks", cropping or altering any identifying