Former German Intelligence Chief Arrested: The High-Level Spies Who Worked for the Other Side

August Hanning, the former head of Germany's Federal Intelligence Service (BND), has been arrested on suspicion of passing state secrets to a foreign intelligence agency. Hanning, 80, led the BND from 1998 to 2005.

According to a statement from federal prosecutors, he is suspected of "treasonous espionage, collecting state secrets, and conspiracy to commit treason" through contacts with foreign intelligence agencies starting in 2010, while working as a private consultant. He is accused of gathering roughly 2,000 classified documents from a former department head who has also been arrested.

The case is far from unique. Over the decades, numerous senior intelligence officers have been exposed working for foreign governments.

1940s–1960s: Kim Philby and the "Cambridge Five"

Kim Philby was a British intelligence officer who secretly worked for the Soviet Union during World War II and the early Cold War. Recruited by Soviet intelligence while studying at Cambridge University in the 1930s, he was the most prominent member of the "Cambridge Five" — a spy ring that supplied British secrets to Moscow.

During the war, he joined MI6, rose to head its anti-Soviet section, and was later posted to Washington, where his relationships with the CIA and FBI gave him access to sensitive information. The intelligence he provided is believed to have destroyed numerous Western operations and exposed agents' identities, including a plot to overthrow Albanian communist leader Enver Hoxha.

In 1951, Philby fell under suspicion and was forced out of MI6 when two other Cambridge Five members, Guy Burgess and Donald Maclean, defected to the Soviet Union. He was suspected of warning them beforehand, though he was officially cleared in 1955. In 1963, aware he was being watched, he fled to Russia, living with his wife Rufina Pukhova from 1971 until his death in 1988. Over nearly two decades, he supplied the Soviets with state secrets, agent identities, cabinet meeting minutes, atomic research, and diplomatic, military and counterintelligence information.

According to Britain's National Archives, one of the agents he exposed was Constantin Volkov, a Soviet intelligence officer who sought to defect to Britain in 1945. Volkov and his wife were arrested and executed in Moscow. The information Philby provided about a joint CIA-MI6 operation in Albania in the late 1940s and early 1950s led to the execution of hundreds of anti-communist agents.

1970s–1980s: Oleg Gordievsky

Oleg Gordievsky was a KGB colonel who spied for British intelligence for more than a decade. The son of an NKVD officer — the KGB's predecessor — he was recruited by MI6 in the early 1970s after becoming disillusioned by the Soviet crackdown on the 1968 Prague Spring protests and the construction of the Berlin Wall.

While working for the KGB, he was stationed in Copenhagen and later London, becoming head of the KGB station there in 1985. The information he gave Britain is credited with revealing the KGB's deep fear that NATO's 1983 Able Archer exercise might be cover for a real nuclear attack. This helped the West understand Soviet fears and ease tensions.

In 1985, Gordievsky fell under suspicion, was recalled to Moscow, drugged and interrogated but not yet charged. MI6 mounted a daring rescue operation, smuggling him across the Finnish border in the trunk of a car. Russia sentenced him to death in absentia. He lived in Britain under protection until his death in 2025.

1980s–1990s: Robert Hanssen

Robert Hanssen was a senior FBI agent who spied for the Soviet Union and later Russian intelligence from 1979 to 2001. He initially studied dentistry at Northwestern University before switching to accounting and information systems. He worked as a Chicago police officer before joining the FBI in 1976.

In 1979, he approached Soviet military intelligence, working with the KGB and its successor agency, the SVR, under the alias "Ramon Garcia." He never met his handlers in person, instead using "dead drops" — leaving classified materials at prearranged spots such as parks, woods, under bridges and on street corners around Washington, D.C. — in exchange for cash or diamonds.

He provided thousands of pages of classified documents, including U.S. nuclear war plans and the identities of Russian officials working for the United States. At least two sources, including Dmitri Polyakov and Valery Marynov, were executed. The 1994 arrest of Aldrich Ames — another American spy for Russian intelligence — led to Hanssen's arrest in February 2001. He pleaded guilty to avoid the death penalty and died in prison in 2023.

2000s: Alexander Yuk Ching Ma

Alexander Yuk Ching Ma is a former CIA officer arrested for spying for China. He worked for the CIA from 1982 to 1989, became a U.S. citizen and lived in Honolulu.

In March 2001, officers from China's Shanghai State Security Bureau asked him to arrange a meeting with a former CIA officer (now deceased, who served from 1967 to 1983). The two met for three days in a Hong Kong hotel room. In exchange for $50,000, they provided classified information to China.

The FBI learned of his ties to Chinese intelligence and hired him as a contract linguist in its Honolulu office to monitor his activity. He was arrested in a sting operation after admitting to an undercover FBI employee that he had helped pass classified information to Chinese intelligence. Ma pleaded guilty in May 2024 and is serving a 10-year sentence.