A father of 14 was a "tyrant" who raped his stepdaughter, fathering four children with her, a Lancashire court heard.
The 58-year-old man is accused of 42 offences including rape, child cruelty, false imprisonment, indecent assault and actual bodily harm.
He has been declared unfit to plead due to his "deteriorating intellectual capacity", Burnley Crown Court heard.
The judge told the jury they must decide whether he committed the acts.
Prosecutors described how the man controlled his children and his partners with verbal, physical and, in one case, sexual abuse for more than 20 years.
The jury heard the man, who did not appear in court, began to sexually abuse his stepdaughter when she was 15.
http://www.bbc.co.uk/news/uk-england-lancashire-19838289
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