Johannes Müller came from Geestemünde (now Bremerhaven). His parents were Charlotte and Wilhelm Müller. Wilhelm was a master saddler and worked for the North German shipping company Lloyd. He furnished luxury ships with furniture and managed the upholstery workshop. Johannes Müller was the third child of his parents, who had six children in total. In November 1916, Johannes Müller went to fight in the First World War. He returned from the war as a soldier during the days of the November Revolution in 1918. He then became a merchant and worked as a commercial clerk. In 1934, Johannes Müller fell ill. He developed delusions and imagined that he deserved the Nobel Prize. In 1935, he was admitted to the Göttingen mental hospital for the first time. He was reported for sterilisation, which was decided by the Verden Hereditary Health Court in 1935. Johannes Müller appealed against this decision. However, the Higher Hereditary Health Court in Celle upheld the ruling and Johannes Müller was operated on against his will. In 1936, his condition deteriorated and he began to attract public attention. He was then admitted to the Lüneburg institution. He remained there until he was transferred to the Pirna-Sonnenstein killing centre, where he was murdered on 7 March 1941. The family had his ashes transferred and buried. Later, his parents and siblings were laid to rest alongside him. In 2014, a Stolperstein was laid in front of his parents‘ house on Brommystraße in Bremerhaven.