You would be surprised.
They can find pieces of bombs to determine where the parts where obtain.
(
BrokenCoccyx doesn't mind if you grope on, Thu 2 Aug 2012, 18:10,
Reply)
is that more to do with tracing supplies?
As in, it was this type of compound which is only manufactured by x and y etc, or was also used on this other occassion.
Rather than being able to identify it as a can of spray paint which can be bought in any number of shops. Or over the internet.
(
JeremyBeadlesHands, Thu 2 Aug 2012, 18:14,
Reply)
It's a bit of both
The tracing supplies is one of the primary uses of the forensic information - cross indexing purchases and the like but it's amazing how much personally identifying information (DNA, fingerprints etc.) can survive a regular explosion (sans paint).
(, Fri 3 Aug 2012, 17:09, Reply)