With this verdict he was discharged from the United States Volunteers on May 29, 1863. While newspapers like the New York Times (that was related to the regiment from its first hour) were generally portraying him in a good light, others, like the New York Tribune, did not and used his case as prejudiced verdict against immigrants. The place where he was to be confined was the famous Sing Sing Prison in Ossining, New York. Arriving at the prison with a great media presence it is alleged that, when asking for a better treatment, he told a guard, "I speak twelve languages!" to which the guard dryly replied, "Here in Sing-Sing we only speak one and we want very little of that." After his release, Frederick D'Utassy was the owner of a portrait studio, and later worked as an insurance agent and importer with some success. He reportedly was a 33rd degree Freemason. Living in New York City for many years, he later moved to Baltimore, Maryland. On May 5, 1892, he was found unconscious in his gas filled hotel room in Wilmington, Delaware. D'Utassy was brought to a nearby hospital where he died later in the day in the presence of his siblings. He was buried at Loudon Park Cemetery in Baltimore, and was outlived by his widow and son. He also was the namesake of his brother Anton's son, George D'Utassy.
