Believe Taff came to a sensible conclusion on what was put before him. Post conviction in 1986, Ronald Stone ( chief of Essex police) backed Taff on his initial decision. However I don't believe he was fooled by Bamber, it's just a decision he came to. SC had a long history of mental illness and was a paranoid schizophrenic.
Think the portrayal of taff as a bumbling idiot in the drama was insulting and wrong. And disrespectful.
Whether he officially changed stance, we will never know. He died in July 1986. I'll not go off what his colleagues said due to bias of the events.