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John Hoolulu Siemsen
Serial Killer
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An Oahu inmate was murdered in his cell. Was a housing ...
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See any errors? Let us know!John Ho'olulu Siemsen: A Detailed Account of His Crimes
Early Life and Background
John Ho'olulu Siemsen was born in November 1885. Little is documented about his early life, leaving much of his background shrouded in mystery.Criminal Activities
Siemsen's criminal activities have been a subject of historical records, though specific details about his crimes, including the names of his victims, dates, and locations, are scarce. Available information indicates that he was involved in serious offenses that ultimately led to his execution.Known Victims
Due to limited historical documentation, specific details about Siemsen's victims are not readily available. The lack of comprehensive records from that era contributes to the scarcity of information regarding the identities and circumstances surrounding his crimes. ...Read MoreVictims
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Confirmed Victims: (3)
Johannes Pfitzner , Date of Death: August 20, 1906 ...View 2 additional victims
Survivors:Dr. Leland , Date of Attack: July 10, 1906 A. Sasaki , Date of Attack: October 3, 1906 Henry Behrend , Date of Attack: November 3, 1906
Survivors:
Links to Additional Sources (4)
See any mistakes? Let us know!Killer's Details
John Hoolulu
Siemsen
November, 1885 Hilo, Hawaii County, Kingdom of Hawaii
July 31, 1908 (aged 22) San Quentin State Prison, San Quentin, California, United States
Executed by hanging
Male
White/Native Hawaiian
The San Francisco Gas Pipe Murderer
Capital murder
Death (1906)
3
August - October 1906
California
San Francisco
November 3, 1906
San Quentin State Prison — San Quentin, California
07/03/2025
