Ernst Fließ, born on January 9, 1877 in Groß-Salze, came from as established Jewish family. His parents were Gustav Fließ and Henriette, born Fliehs. The Fließ family had several children, including Ernst and his brother Arthur. The Fließ family had been established in Groß-Salze since the first half oft he 19th century.
Ernst Fließ attended the Gymnasium Schönebeck and subsequently studied law. In 1906, he was admitted as a lawyer and initially operated his law firm at Victoriastraße 1, later at Alten Ulrichstraße 8. Ernst Fließ was severely injured in the first World War. After the war, he continued to work and reside at Alten Ulrichstraße 8.
On June 14, 1919, Ernst Fließ married Hedwig Elsbeth Kanzler, an evangelic woman from Magdeburg. The marriage remained childless. After the war, Ernst Fließ initially practiced solely as a lawyer; from May 28, 1920, he was also licensed as a notary. The joint law firm was located at Otto-von-Guericke-Straße 18 and operated with lawyers Dr. Martin Cohn and William E. Spanier.
Despite Nazi persecution, Ernst Fließ initially retained his license as a lawyer, while his colleague Dr. Cohn had his revoked. In 1934, a procedure for exclusion from the legal profession was initiated against Fließ and Dr. Badt. The proceedings ended with a reprimand and a fine for Fließ. Despite furhter discrimination, he continued to practice as a lawyer.
In 1935, Ernst Fließ was dismissed as a notary. Following a legal proceeding against lawyer Dr. Kuhlmey, he was sentenced to nine months in prison for „knowingly false statements and defamation of lawyer Kuhlmey.“ This led to his physical and psychological deterioration. On January 29, 1936, Ernst Fließ decided to take his own life. He was found poisoned in his apartment.