This was followed by study visits to Göttingen, Hamburg and Würzburg, where he passed his Staatsexam (state examination) in 1925 and received his doctorate.

Hallermann also passed his medical examination there in 1932 and completed his habilitation in 1935 with a thesis on “Sudden cardiac death in coronary artery disease,” which was published as a monograph in 1939.

[3] After beginning his teaching career in Berlin in 1935, Hallermann represented the chair for forensic medicine in Frankfurt am Main in the winter semester of 1940/41 after the death of Rolf Hey, and on April 1, 1941, he was appointed director of the Institute for Forensic and Social Medicine at Christian-Albrechts University in Kiel, initially as an associate professor.

[5] In 1969, Hallermann was honored with emeritus status and in 1971 he handed over the management of the Kiel Institute to Oskar Grüner.

[4] In connection with the murder charge against the serial killer Adolf Seefeldt, Wilhelm Hallermann summarized that the eleven-year-old student Gustav Thomas had not been poisoned, but that, based on microscopic examinations, bloodshot pressure points on his neck would indicate strangulation.