Jan Sehn was a Polish

Poland

Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

 lawyer

Lawyer

A lawyer, according to Black's Law Dictionary, is "a person learned in the law; as an attorney, counsel or solicitor; a person who is practicing law." Law is the system of rules of conduct established by the sovereign government of a society to correct wrongs, maintain the stability of political...

, 1945-47 investigation judge

Judge

A judge is a person who presides over court proceedings, either alone or as part of a panel of judges. The powers, functions, method of appointment, discipline, and training of judges vary widely across different jurisdictions. The judge is supposed to conduct the trial impartially and in an open...

, and professor at Jagiellonian University

Jagiellonian University

The Jagiellonian University was established in 1364 by Casimir III the Great in Kazimierz . It is the oldest university in Poland, the second oldest university in Central Europe and one of the oldest universities in the world....

 since 1961. He was member of the Commission for the Investigation of Nazi War Crimes, and Chairman of the Kraków District Commission until 1953. In 1945-46 he led the investigations on the site of the Nazi concentration camp Auschwitz-Birkenau. As an investigation judge he prepared the accusation act of the former camp commandant Rudolf Höß

Rudolf Höß

Rudolf Franz Ferdinand Höss was an SS-Obersturmbannführer , and from 4 May 1940 to November 1943, the first commandant of Auschwitz concentration camp, where it is estimated that more than a million people were murdered...

. From 1949 director of the Institute of Forensic Research in Kraków

Kraków

Kraków also Krakow, or Cracow , is the second largest and one of the oldest cities in Poland. Situated on the Vistula River in the Lesser Poland region, the city dates back to the 7th century. Kraków has traditionally been one of the leading centres of Polish academic, cultural, and artistic life...

. Sehn died suddenly 1965 in Frankfurt

Frankfurt

Frankfurt am Main , commonly known simply as Frankfurt, is the largest city in the German state of Hesse and the fifth-largest city in Germany, with a 2010 population of 688,249. The urban area had an estimated population of 2,300,000 in 2010...

.

In 1966 Institute of Forensic Research in Kraków was named after Jan Sehn.

He was the cousin of Wanda Szczerba (1910–1998), who was married to engineer and technical director of Fablok

Fablok

Fablok is a Polish manufacturer of steam locomotives, based in Chrzanów. Until 1947 the official name was The First Factory of Locomotives in Poland Ltd. , Fablok being a widely used syllabic abbreviation of Fabryka Lokomotyw. It is now named "BUMAR - FABLOK S.A. "...

 Klemens Stefan Sielecki

Klemens Stefan Sielecki

Klemens Stefan Sielecki was a Polish engineer and technical director of the first Polish Locomotive Factory Fablok in Chrzanów in the post-war years until 1964....

(1903–1980).

Selected publications

• Wspomnienia Rudolfa Hoessa komendanta obozu oświęcimskiego, ed. Jan Sehn, Warsaw, 1960.
• Konzentrationslager Oswiecim-Brzezinka (Auschwitz-Birkenau), Warsaw, 1957.