Josef Jakobs SW3, on 4–5 August 1941. The trial was held "in camera" because the German agent had been apprehended in a highly classified intelligence operation known as the Double Cross System. The British were aware that Jakobs was coming because his arrival information had been passed on to MI5 by the Welsh nationalist and "Abwehr" double agent Arthur Owens. After a two-day trial which involved hearing the testimony of eight witnesses, Jakobs was found guilty of spying and sentenced to death. Jakobs's execution took place at the miniature rifle range in the grounds of the Tower of London on 15 August
Josef Frolík for the StB and detailed his defection. The Czechoslovak government sentenced him to death in absentia. In 1987, he was diagnosed with cancer and died in May 1989, although some claim that he is still alive in the US using a false identity. Josef Frolík Josef Frolík (September 22, 1928 – May 1989) was a Czechoslovak spy who, in 1969, defected to the United States and joined the CIA. Josef Frolík was born in Libušín, Czechoslovakia. He graduated from secondary school at the end of World War II. After the war he studied at the business academy in Slaný and