The red Opel Calibra shone fiercely, garishly, in the bright heat of that late June day at Newlands Cross. For five hours, it wasn’t moved, the red seeming to get redder as each passing hour clocked the symbol. A bloodstain. On a nation’s innocence. But it was much more than a symbol. Inside, for all those hours, lay the blood-soaked body of journalist Veronica Guerin, murdered as she returned from a traffic court hearing at Naas courthouse.   That was exactly 29 years ago. Those terrible five hours seemed like an eternity. We didn’t know it at that moment, but the…