Shortly after the divorce was final, on 3 August 1917, Errázuriz drove from her home in Roslyn, New York to the home of her ex-husband, The Box, in Meadowbrook Colony, near Westbury.
She had legal claims over the custody of their son, since she and her husband had been given shared custody over him, but de Saulles refused to acknowledge the court's decision.
She arrived at The Box shortly after 8pm, and found her former husband sitting on the porch of the house.
They argued, and she pointed a gun at his head demanding him to immediately hand over the child to her.
When he tried to disarm her, she shot him five times.
He was rushed to the Nassau County Hospital, but died there at 10.20pm from his injuries.
In the meantime, she awaited at the house for the arrival of the police, to whom she surrendered.
She was charged with murder in the first degree and imprisoned in the Nassau County Jail at Mineola, New York, leading to a sensational trial.

The widely reported case went on for months.
Errázuriz was defended by Henry Uterhart, a noted criminalist of the time, and the principal witness for the defense was Suzanne Monteau, Errázuriz's French maid, who had accompanied her that night and completely supported her version of the events.
Blanca Errázuriz became the darling of the press, and the champion of the suffragettes who portrayed her as the victim of the chauvinism prevalent in the society of the time.

Blanca Errázuriz was unanimously acquitted of the murder charges on 1 December 1917 in what was called a "popular" verdict.
Shortly after the divorce was final, on 3 August 1917, Errázuriz drove from her home in Roslyn, New York to the home of her ex-husband, The Box, in Meadowbrook Colony, near Westbury. She had legal claims over the custody of their son, since she and her husband had been given shared custody over him, but de Saulles refused to acknowledge the court's decision. She arrived at The Box shortly after 8pm, and found her former husband sitting on the porch of the house. They argued, and she pointed a gun at his head demanding him to immediately hand over the child to her. When he tried to disarm her, she shot him five times. He was rushed to the Nassau County Hospital, but died there at 10.20pm from his injuries. In the meantime, she awaited at the house for the arrival of the police, to whom she surrendered. She was charged with murder in the first degree and imprisoned in the Nassau County Jail at Mineola, New York, leading to a sensational trial.
The widely reported case went on for months. Errázuriz was defended by Henry Uterhart, a noted criminalist of the time, and the principal witness for the defense was Suzanne Monteau, Errázuriz's French maid, who had accompanied her that night and completely supported her version of the events. Blanca Errázuriz became the darling of the press, and the champion of the suffragettes who portrayed her as the victim of the chauvinism prevalent in the society of the time.
Blanca Errázuriz was unanimously acquitted of the murder charges on 1 December 1917 in what was called a "popular" verdict.
Blanca Errázuriz