Opinion: ‘At my first meeting with Saddam Hussein, within 30 seconds, he knew two things about me,’ says FBI interrogator
https://edition.cnn.com/2023/03/14/opinions/saddam-hussein-iraq-war-interrogations-george-piro-bergen/index.html
It would be true that US mistakenly arrested Saddam Hussein as a criminal of September 11, 2001, attacks. But, it doesn't mean that he is innocent. He is the criminal of massacre on protesters and reign of terror.
He must be worthwhile being punished.