It sounds like something straight out of a noir film -- an unidentified killer goes on a murder spree and vanishes, taunting the cops before disappearing. Unfortunately, this phenomenon isn't limited to the world of fiction. Learn more about murderers who remain on the loose in in the second part of this two-part update on serial killers who, as of today, seem to have escaped justice.

They don't want you to read our book.: https://static.macmillan.com/static/fib/stuff-you-should-read/

See omnystudio.com/listener for privacy information.