Otto von Rosen was a Swedish military officer and sport shooter.

He was born in Stockholm

Stockholm

Stockholm is the capital and the largest city of Sweden and constitutes the most populated urban area in Scandinavia. Stockholm is the most populous city in Sweden, with a population of 851,155 in the municipality , 1.37 million in the urban area , and around 2.1 million in the metropolitan area...

, Sweden. He participated at the 1908 Summer Olympics

1908 Summer Olympics

The 1908 Summer Olympics, officially the Games of the IV Olympiad, were an international multi-sport event which was held in 1908 in London, England, United Kingdom. These games were originally scheduled to be held in Rome. At the time they were the fifth modern Olympic games...

 in London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

. His best Olympic result was in the moving target small-bore rifle, where he placed 8th.

During World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

 he was suspected of espionage

Espionage in Norway during World War I

Norway was a neutral country during World War I, but the country was subject to extensive espionage from both sides in the conflict.-Background:Two proactive Acts had been sanctioned by the Norwegian Parliament in the early phase of the conflict. These were Lov om forsvarshemmeligheter in 1914, and...

 and sabotage in favour of Germany

German Empire

The German Empire refers to Germany during the "Second Reich" period from the unification of Germany and proclamation of Wilhelm I as German Emperor on 18 January 1871, to 1918, when it became a federal republic after defeat in World War I and the abdication of the Emperor, Wilhelm II.The German...

, after being arrested in Karasjok

Karasjok

Kárášjohka or is a village and municipality in Finnmark county, Norway. The administrative centre of the municipality is the village of Karasjok.-Name:Karasjok is a Norwegianized form of the Sámi name Kárášjohka...

, Norway, in 1917. In his confiscated luggage were found explosives, bottles with the toxin curare

Curare

Curare is a common name for various arrow poisons originating from South America. The three main types of curare are:* tubocurare...

, and anthrax bacteria

Bacillus anthracis

Bacillus anthracis is the pathogen of the Anthrax acute disease. It is a Gram-positive, spore-forming, rod-shaped bacterium, with a width of 1-1.2µm and a length of 3-5µm. It can be grown in an ordinary nutrient medium under aerobic or anaerobic conditions.It is one of few bacteria known to...

hidden in sugar.