People

Michał Goleniewski

Polish intelligence officer and 'triple agent' (CIA code name SNIPER) whose 1959–61 leads exposed Heinz Felfe and Hans Clemens in the BND, George Blake in MI6 and others; defected to the US in 1961; later claimed to be Tsarevich Alexei Romanov.

Ties

To	Role	Years	Verdict	Source
Heinz Felfe	his leads started the CIA investigation that led to Felfe's arrest	1959–1961	Documented · occurred	en.wikipedia.org
BND	reported two KGB agents inside the BND (Felfe, Clemens)	1959	Documented · occurred	spartacus-educational.com
KGB	exposed KGB penetrations of Western services from inside the Polish service	1959–1961	Documented · occurred	en.wikipedia.org
CIA	source SNIPER from 1959; defected to the US	1959–1961	Documented · occurred	en.wikipedia.org
James Jesus Angleton	discredited under Angleton's counterintelligence regime after Golitsyn called other defectors KGB plants	1961–1964	Unproven	thehistoryreader.com

Tied from

From	Role	Years	Verdict	Source
Heinz Felfe	Goleniewski's leads started the CIA investigation that led to Felfe's arrest	1959–1961	Documented · occurred	en.wikipedia.org
James Jesus Angleton	Goleniewski discredited under his counterintelligence regime after Golitsyn called other defectors KGB plants	1961–1964	Unproven	thehistoryreader.com

Documented

Item	Record	Tag
Sent Polish and Soviet secrets anonymously from early 1959, addressed to the FBI; intercepted by the CIA	Wikipedia; Tate (2021)	SNIPER letters
Leads exposed George Blake (MI6), Harry Houghton (Royal Navy), Irvin Scarbeck, Stig Wennerström, and Heinz Felfe and Hans Clemens (BND)	Wikipedia; Spartacus	exposures
Defected to the US, January 1961	Wikipedia	defection 1961
Later claimed to be Tsarevich Alexei Nikolaevich, surviving son of Nicholas II	Wikipedia ("unsubstantiated claims")	claim was made

Alleged (stated neutrally)

Item	Source	Tag
A Soviet-controlled organization of former Nazis ('Hacke') was active postwar	Goleniewski	Hacke network
He became the first casualty of Angleton's mole hunt, discredited because Golitsyn insisted other defectors were plants	Tim Tate, The Spy Who Was Left Out in the Cold (2021)	Angleton casualty

Why it's here

Added 2026-10-07 as the bridge between the parked Heinz Felfe thread and James Jesus Angleton: he caught one and was undone by the other's regime. The 'Hacke' claim bears directly on the absorbed-network question in the Felfe/Reinhard Gehlen thread.