Dr Adrian Grounds, Ian Brady's medical witness, said there had been "periodic conflicts with other patients".
The hospital's QC refers to the removal of "his weapon - his pen".
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Youngsters are still consuming too much unnecessary sugar and caffeine, according to the study.
Home Office data offers an incomplete picture of the perpetrators and victims, the National Audit Office (NAO) have said.
The report concludes that nine million adults suffer from constant loneliness, which is as harmful to health as obesity or smoking.