The son of former German business leader Hanns Martin Schleyer, who was murdered by the far-left Red Army Faction (RAF) in 1977, has heavily criticized authorities for the time it took to discover Daniela Klette.
The suspected RAF terrorist was arrested in an apartment in Berlin on Monday. She had been living there under a false identity and police found weapons at the address.
"The fact that an RAF terrorist was able to live undetected and unchallenged in the centre of Berlin for 20 years is unbelievable," Jörg Schleyer told the Bild newspaper on Thursday.
Politicians must now investigate how this came to be and "think about the consequences," he added.
The RAF murdered more than 30 people during their reign of terror
but disbanded in 1998.
Two other suspected terrorist members are still on the run - Burkhard Garweg and Ernst-Volker Staub.
Despite the time it has taken to find Klette, Schleyer's son said he was hopeful the other two could also be brought to justice.
"Even today there is still a realistic chance of solving far-left terrorist murders. That is reassuring for me and for the many relatives of the 34 RAF murder victims," he said, adding that the cases must not remain "unsolved and unpunished."
