Credit: Works Progress Administration posterPublic domainSourceSOLVEDListenMacon County, Alabama · 1932
Between 1932 and 1972, the U.S. Public Health Service studied untreated syphilis in nearly 400 Black men in Macon County, Alabama, without informing them of their diagnosis or providing treatment, and more than 100 died as a result.
Credit: gargantuenCC BY-SA 2.0SourceUNSOLVEDListenKingsbury Run, Cleveland, Ohio · 1930s
Between 1935 and 1938, at least twelve people were killed and dismembered in Cleveland, Ohio, with remains left in the Kingsbury Run area; the case remains unsolved despite an investigation once led by Eliot Ness.
Credit: The Julia Wallace Murder Foundation (williamherbertwallace.com)Editorial useSourceUNSOLVEDListen29 Wolverton Street, Anfield, Liverpool · 1930s
Julia Wallace was beaten to death in her Liverpool home in January 1931 after her husband William was lured away by a hoax phone call. He was convicted but the Court of Criminal Appeal quashed the verdict months later, and the killing remains officially unsolved.
UNSOLVEDListenCoogee Aquarium Baths, Coogee, Sydney, New South Wales, Australia · 1935
In 1935 Sydney, a captive tiger shark vomited up a tattooed human arm, sparking a murder investigation into the death of James "Jimmy" Smith that led to a suspicious suicide attempt, a second man's unsolved murder, and an acquittal — leaving the case officially unsolved to this day.
Credit: Period press photo via Wikipedia (Murder of Phyllis Reiger)Public domainSourceSOLVEDListenRockhampton, Queensland, Australia · 1934
Phyllis Reiger, 22, was strangled by her former boyfriend, prison warder Jack McQuade, in his car in Rockhampton, Queensland in the early hours of 16 January 1935, two days after McQuade married another woman.
Credit: Credits to Mourad Ben Abdallah / Wikimedia CommonsCC BY-SA 3.0SourceSOLVEDListenPlainpalais, Geneva, Switzerland · 1932
On 9 November 1932, Swiss Army recruits deployed to police a fascist rally in Geneva's Plainpalais district opened fire on anti-fascist counter-protesters, killing 13 people and wounding 65 in a shooting lasting about 12 seconds.
Credit: 松竹キネマPublic domainSourceSOLVEDListenMt. Sakata, Ōiso town, Kanagawa Prefecture, Japan · 1932
In May 1932, a man and woman were found dead atop Mt. Sakata in Ōiso, Japan, in an apparent double suicide by poison; the ensuing media frenzy, a body-snatching incident, and a hit film adaptation were linked by contemporaries and later commentators to a wave of copycat suicides.
Credit: Unknown, Landesarchiv Berlin, A Rep. 358-02 Nr. 108586 Foto 3546Public domainSourceSOLVEDListenGaflei, Liechtenstein · 1933
In April 1933, Liechtenstein Nazi sympathizers and German collaborators attempted to kidnap Jewish theatre directors Fritz and Alfred Rotter to forcibly return them to Nazi Germany; Alfred Rotter and his wife Gertrud died falling into a ravine while fleeing, and Fritz Rotter escaped with injuries.
SOLVEDListenCrash site near Jagumba, Snowy Mountains, New South Wales · 1931
On 21 March 1931, the airliner Southern Cloud vanished during a flight from Sydney to Melbourne with eight people aboard, becoming Australia's first major airline disaster. Its wreckage was not found until 1958, in mountainous terrain far off course.
UNSOLVEDListenWorcester, Massachusetts · 1934
Etta Riel, a 20-year-old Massachusetts college student and new mother, vanished from Worcester, Massachusetts, on November 22, 1934, the day of a scheduled paternity court hearing against a man she had named as her child's father. Her disappearance remains unsolved.
1930 is the year with the most files in the decade, 6 of them. 34 files carry an exact date; the rest are dated to the decade by the record.
They are spread across 15 countries; the most are in United States (15), United Kingdom (4) and Australia (3). By type, the largest groups are murder and homicide cases (16), fraud and extortion cases (3) and domestic violence cases (3).
7 files of the 36 have coverage attached: 8 videos, podcasts and documentaries from 5 creators. Bailey Sarian, Brooke Makenna and Morbid have covered the most of them.
Every file is written from cited sources and pinned where it happened, and every person named carries the legal status the record gives them. If you hold information about an unsolved case, contact the investigating agency named in its file rather than posting it publicly. Families and anyone involved can request a correction from any file.
Charles Lindbergh testifying — Credit: World Telegram staff photographerPublic domainSource
Syphilis-poster-wpa-cure — Credit: Works Progress Administration posterPublic domainSource
Rose Wallace — Credit: gargantuenCC BY-SA 2.0Source
Andrew James Peters 42nd Mayor of Boston — Credit: Transferred from en.wikipedia to Commons. (Original text: The Municipal Register for…Public domainSource
Phyllis Reiger — Credit: Period press photo via Wikipedia (Murder of Phyllis Reiger)Public domainSource
Monument 9 novembre — Credit: Credits to Mourad Ben Abdallah / Wikimedia CommonsCC BY-SA 3.0Source
Tengoku ni Musubu Koi — Credit: 松竹キネマPublic domainSource
Julia Wallace — Credit: The Julia Wallace Murder Foundation (williamherbertwallace.com)Editorial useSource
Landesarchiv Berlin A Rep 358-02 108586 3546 Rotter Bad Ragaz — Credit: Unknown, Landesarchiv Berlin, A Rep. 358-02 Nr. 108586 Foto 3546Public domainSource
File:Babes in the Wood Memorial (PA Route 233).JPG — Credit: ConcordCC BY-SA 4.0Source
A suicide-prevention sign and crisis phone on the Golden Gate Bridge, San FranciscoCC BY-SA 3.0Source
1933 Belfast shooting — Credit: Presumably The Bangor Daily NewsPublic domainSource
File:Violette Kaye.jpg — Credit: Unknown author Unknown authorPublic domainSource
Midtown Manhattan October 2022 073 — Credit: Kidfly182CC BY-SA 4.0Source
These files are published and cited but are kept out of search listings for now, either because they fall outside Casepin’s true-crime scope or because they are still being deepened.
36. By status: 9 unsolved, 2 cold and 25 solved. The count covers published files only and changes as new files clear review.
Tuskegee Syphilis Study, with 1 video, podcast or documentary linked from its file. Open the file
Bailey Sarian (2 cases), Brooke Makenna (2 cases) and Morbid (1 case), among 5 creators in all.
United States (15), United Kingdom (4) and Australia (3).
It rebuilds hourly from the published files; the newest file change here is dated Jul 14, 2026. A status changes only when the record behind it does.
