Josef Jakobs (30 June 1898 – 15 August 1941) was a German spy and the last person to be executed at the Tower of London. He was captured shortly after parachuting into the United Kingdom during the Second World War. Convicted of espionage under the Treachery Act 1940, Jakobs was shot by a military firing squad. He was not hanged because he was captured as an enemy combatant.

Jakobs' court martial took place in front of a military tribunal at the Duke of York's Headquarters in Chelsea, London SW3, on 4–5 August 1941. 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 1941. He was seated blindfolded in a brown Windsor chair. Eight soldiers from the Holding battalion of the Scots Guards, armed with .303 Lee–Enfields, took aim at a white cotton target (the approximate size of a matchbook) pinned over Jakobs' heart. The squad fired in unison at 7:12 a.m. after being given a silent signal from Lieutenant-Colonel C.R. Gerard (Deputy Provost Marshal for London District). Jakobs died instantly. A postmortem examination found that one bullet had hit Jakobs in the heart and the other four had been on or around the marked target area. As three members of the eight-man firing squad had been issued with blanks, only five live rounds were used.

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