Sources close to the probe have told ITV News that the arrest is a result of the photofit released in November. The arrest is the first of a number of the arrests and is believed to be critical to the investigation, the sources said.
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His representatives said Cassidy, who was hospitalised last week, died "surrounded by those he loved."
The company’s recently appointed Chief Executive Dara Khosrowshahi said the breach was made by two individuals outside the company.