Upon his arrest by the NKVD, his wife and daughter were sent into internal exile, where his wife Julia was forced to support their daughter by finding odd jobs, which she would lose when it was discovered that her husband had been arrested as a "traitor".
V. V. Rachesky, a cell mate of Rokossovsky, wrote in his memoirs that Rokossovsky blamed the persecution of innocent people on the NKVD and was "naive", refusing to acknowledge Stalin's role in creating the treacherous environment. He described Rokossovsky's refusal to sign a false confession:
"Those who refused to sign a false statement were beaten up, as long as the false statement was not signed. There were steadfast people who stubbornly did not sign. But there were relatively few. K. K. Rokossovsky, as he sat with me in the same cell did not sign a false statement. But he was a brave and strong man, tall and broad-shouldered. He too was beaten."
His grandson Colonel Konstantin Rokossovsky Vilevich says that his grandfather escaped the fate of so many other officers because he refused to sign a false statement and by proving to the court that the officer who his NKVD accusers claimed had denounced him had been killed in 1920 during the civil war;
"The evidence was based on the testimony of Adolph Yushkevich, a colleague of my grandfather in the Civil War. But my grandfather knew very well that Yushkevich died in Perekop. He said that he would sign [a confession] if Adolph was brought for a confrontation. They looked for Yushkevich and found that he had died long before."
Kresty Prison, where Rokossovsky was imprisoned in Leningrad, today Saint Petersburg
Alexander Solzhenitsyn reports that Rokossovksy endured two mock shooting ceremonies where he was taken out at night by a firing squad, but then returned to prison. Living relatives say that Svetlana Pavlovna, wife of Marshal Kazakov, confirmed that he sustained injuries including broken and denailed fingers and cracked ribs on top of enduring mock shooting ceremonies. Rokossovsky never discussed his trial and imprisonment with his family, only telling his daughter Ariadne that he always wore a revolver because he would not surrender alive if they came to arrest him again.
BASED NKVD ARRESTING SOMEONE ON THE CLAIMS OF SOMEONE WHO WAS DEAD AND TRYING TO GET HIM TO SIGN A FALSE CONFESSION SO THEY COULD KILL HIM
Holy shit that's actually so fucked up. Imagine trying to live in such a paranoid atmosphere.