(New Scientist) An analysis of exploded bomb fragments could yield vital clues to help identify the perpetrator of the fatal twin bombings of the Boston marathon on 15 April.
If enough of the bombs survived the blast then it may be possible to find out more about their design, firing system, and the type of explosive and detonator they used, says Roland Alford, of Alford Technologies in Chippenham, UK, which makes bomb disposal equipment.
“My guess is that these were remotely activated bombs because the two devices went off very close to each other, so were probably being controlled in some way,” he says. The bomber could have used a timer or a switch connected by wires, but a cellphone or radio-based remote control is more likely. Each could be traceable – through SIM cards, call records or purchase histories.