Dyfed-Powys Police said they were looking at "all possible causes" for the crash on a straight section of the Pontamman Road.

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The crash is said to have happened on a high section of the road at a location that has no safety barriers.

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The court heard the 115 mph crash took place when the train was derailed by a cracked section of the track.

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Witnesses told police a man was seen walking away from the crash site at the intersection of Wilson Street and Kent Avenue in the Williamsburg section of Brooklyn.

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Brown, who saw the crash from his 38th-row seat in the Petty grandstand, said he would be back in the same section for the season-opening Sprint Cup event.

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