explosive new allegations are coming to light today in a lawsuit filed by a fox news contributor. the story begins last july when staffer seth rich was murdered in what dc police believe was attempted robbery gone wrong. his murder was spun into a baseless conspiracy theory. this new lawsuit alleges it was fox news who purposely cooked up the false story with white house input. what's more, that allegedly president trump signed off on it. randi kaye picks up the story from there. >> reporter: when democratic national committee staffer seth rich was killed, a conspiracy was born. caught up in it, this man. >> i do believe i was used as a pawn in this entire thing. >> reporter: his name is rod wheeler. he's a former dc homicide detective and fox news