Oscar Pistorius has left the courtroom for a 45-minute break. His eyes appeared bloodshot.
His relatives in the public gallery are embracing.
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Transport Secretary Chris Grayling believes Network Rail should share the responsibility with private train operating companies.
Two vehicles were swallowed up by the sinkhole on Sunday night, killing Dora Linda Nishihara and injuring one man.
Elliott Livingstone, aged three, spent most of his life in hospital before the operation in April.