"Chris Ryder", is a professional squash (sport)/squash player who represents England. He reached a career-high world ranking of World No. 17 in January 2008.

More Chris Ryder on Wikipedia.

This is going to be an enduring mystery. The answer died with Denis Donaldson.

To say, as Sinn Fein does, there was a British conspiracy to bring down power-sharing doesn't square with the facts as I understand them.