He said Mr Bell was looking for something on the back seat of the vehicle they were in when Mr Brown suddenly felt a stabbing pain in the back of his neck.

BBC: Bedford businessman Barry Bell 'tried to kill' Gary Brown

If you have acute pericarditis, the most common symptom is sharp, stabbing chest pain behind the breastbone or in the left side of your chest.

CNN: Pericarditis

By November the pain was so bad it felt like a knife was stabbing him in the stomach.

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