Mr Bo may be under some form of detention, too, though for the moment he remains in the ruling Politburo.

ECONOMIST: Uncertain politics

But facing criticism over such an open-ended form of detention, Mr Jones sought to clarify what flexibility the police needed in such cases.

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In France, no form of preventive detention is available for offenders under the age of 16, except for the most serious crimes (rape, murder, armed robbery).

ECONOMIST: France