 Law enforcement agencies could come and find me, but I couldn't tell them where she was because I don't know where she is. A years-long investigation has led BBC journalists down a rabbit hole of spies, mafia bosses, and an explosive new allegation that Ruja Ignatova was murdered by the suspected king of the Bulgarian underworld. Today, how much is fact? How much is rumor? Will we ever find out what happened to the missing crypto queen?