After leaving Goldman, Taylor returned to Morgan Stanley, where he remained until July 2012.

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On Thursday, Lord Chief Justice Sir Declan Morgan said Taylor had gone out armed with a knife intent on carrying out a random and motiveless killing.

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Martin Morgan-Taylor made the unexpected discovery, which has two postmarks, one in the Isle of Wight on 31 July 1968 and a second from Peterborough on 8 April 2013.

BBC: The front and back of the post card