The death of a British businessman has become central to perhaps the biggest political crisis in China for a generation.

The authorities there believe Neil Heywood was murdered by the wife of one of China's leading politicians, Bo Xilai.

She's in detention, and Mr Bo has been stripped of his positions in the ruling Communist Party.

All this has upset the party's plans for its once-in-a-decade reshuffle later this year.

Michael Bristow reports from Beijing.

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