Louis Dabner & John Seimson: Gaspipe Murders

Louis Dabner was born Sep 1899 in California to William Dabner(1858-1907) & Lucinda Silveira (1863-1923). He never married.



Inmate #21978 San Quentin Prison
Rec:23 Jan 1907
Crime: Murder 1st Degree
Term: Death




His partner:

John Seimson was born 1879 in Hawaii to John Francis H Seimson (1841-1888) and Mary Anna Kaapa (1860-1918). He was married to Hulda Van Hoffen (1891-?). on 31 Oct 1906 in California.



Inmate #21985 San Quentin Prison
Rec: 26 Jan 1907
Crime: Murder 1st Degree
Term: Death


They were known as the Gaspipe Thugs committing murders and robberies in San Francisco, CA.

They were called the Gaspipe Thugs because they purchased a gaspipe from a hardware store and that was the weapon used to murder their victims.

Here are some newspaper articles about their crimes:

https://www.newspapers.com/clip/34003118/louis_dabner/

https://www.newspapers.com/clip/34003066/louis_dabner/

https://www.newspapers.com/clip/34003168/louis_dabner/

https://www.newspapers.com/clip/34003248/louis_dabner/

The Trial and verdict:

https://www.newspapers.com/clip/34004383/louis_dabner/

https://www.newspapers.com/clip/34005239/louis_dabner/

https://www.newspapers.com/clip/34004328/louis_dabner/

https://www.newspapers.com/clip/34770859/louis_dabner/

https://www.newspapers.com/clip/34003309/louis_dabner/

Louis Danber's father William gets ill.

https://www.newspapers.com/clip/34770615/william_dabner/


William Dabner dies

https://www.newspapers.com/clip/34770450/william_dabner/


Louis gets sick while in San Quentin:




Here's a photo I found with the 2 thugs and the police at the police depart when they were confessing their crimes.



Seimson and Dabner with his pipe thugs
1907


Seimson and Dabner with his pipe thugs of 1906 --Left to right: Judge E. Shortale, Police Officer Jack Attridge, Police Officer (not known), Police Officer J. Doyle, Capt. Thos. Duke, Simson and Dabner, Police Officer J. Rice. Tried and Convicted in Oakwood Hall corner Bush and Divisadero Sts. 

John Seimson had the following siblings and I was fascinated by a mystery of when they dies and I never found out how or why.

Caroline Seimson
1878–1908
Charles Frances Siemson
1881–1909
John H Siemsen (Gaspipe Thug)
1884–1908
Edward Seimson
1886–1909
George Kealoha Seimson
1886–1934
Richard R Seimson
1887–1902

He wrote a diary while he was in prison and it was all written to his mother. It was published in the newspaper and it's not a great copy but it's remarkable.

https://www.newspapers.com/clip/34773050/john_siemsen_diary/

https://www.newspapers.com/clip/34772787/john_siemsen_and_louis_dabner/

I didn't find John's other San Quentin record for Grand Larceny I suppose they misspelled his last name.

They were executed 31 July 1908 at San Quentin Prison, hung on the gallows.

Here is Louis Danber's Memorial on Find A Grave: 

https://www.findagrave.com/memorial/138599266

Here is John Siemsen Find A Grave Memorial Grave:

https://www.findagrave.com/memorial/82150708

As for John's wife Hulda Van Hoffen
BIRTH AUG 1891 • California She walked away from him. She loved having the jewelry and furs his robberies bought but as soon as he confessed she was gone, I am not sure she divorced him but she did get married again to Armando Barney Bonacorsi he was from Italy and died in 2001 in Michigan, according to  the city directors, the only records I could find for both of them they were living in San Francisco in 1935.



She was  very beautiful.I have no idea when and where she died.

What a story, two families left in turmoil. I would like to know what the other family members died of.


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