One avenue of investigation is already closed off to forensic officials working the Boston Marathon bombing case due to efforts dating back decades by the National Rifle Association and gun manufacturers.
The FBI said Tuesday that gunpowder, along with pieces of metal and ball bearings, were packed into at least one pressure cooker and another device to make the crude bombs that killed three people—including an 8-year-old boy—and wounded more than 170 more during the Boston Marathon Monday.
But a crucial piece of evidence called a taggant that could be used to trace the gunpowder used in the bombs to a buyer at a point of sale is not available to investigators.
“If you had a good taggant this would be a good thing for this kind of crime. It could help identify the point of manufacturer, and chain of custody,” Bob Morhard, an explosives consultant and chief executive officer of Zukovich, Morhard & Wade, LLC., in Pennsylvania, who has traced explosives and detonators in use in the United States and Saudi Arabia, told MSNBC.com. “The problem is nobody wants to know what the material is.”
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