Home›Unsolved and Foundational Investigations›Unsolved Serial Murder InvestigationsGroupUnsolved Serial Murder InvestigationsSerial murder investigations whose offender was never officially identified, including the 1888 Whitechapel murders in London and the 1968 to 1969 murders in Northern California attributed to the Zodiac. A case belongs here when its cited source states that the identity of the offender remains officially unresolved. Entries are recorded as genuinely open questions, and no candidate suspect is named as the offender, so the group describes the state of the investigation rather than any theory of who was responsible.Browse BySourcesComments (0)Reader Challenges (0)Browse ByAll Unsolved Serial Murder InvestigationsUnsolved Serial Murder Investigations2 entriesUnsolved Serial Murder InvestigationsFilter Results2 entriesCase EraAll1888 (1)1968 (1)Case StatusAllUnsolved (2)Investigating InstitutionAllFederal Bureau of Investigation (1)Metropolitan Police Service (1)San Francisco Police Department (1)Concept IllustratedAllCold Case (1)Criminal Profiling (1)Offense InvolvedAllMurder (2)Serial Murder (1)Location or JurisdictionAllSan Francisco Bay Area, California, United States (1)Whitechapel and Spitalfields, London, England (1)Group TreeAllUnsolved Serial Murder Investigations (2)Forensic Discipline UsedAllForensic Document Examination (1)Show ResultsBrowseCompareSelect all 2Jack the Ripper MurdersUnsolved and Foundational Investigations6 linksZodiac Killer CaseUnsolved and Foundational Investigations7 linksSourcesWikipedia: Zodiac Killertier 3Has Member: Zodiac Killer Case, LeadQuote, Has Member: Zodiac Killer Case, LeadThe Zodiac Killer (also known by the pseudonym The Zodiac) is an unidentified serial killer who murdered at least five people in the San Francisco Bay Area between December 1968 and October 1969.View the SourceWikipedia: Jack the Rippertier 3Has Member: Jack the Ripper Murders, LeadQuote, Has Member: Jack the Ripper Murders, LeadJack the Ripper was an unidentified serial killer active in and around the impoverished Whitechapel district of the East End of London, in 1888.View the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.