[Smokin' Joe]

I would have liked to know if finger prints could have been lifted from it. Likely not, however.

Sometimes the construction and materials used in the detonator can provide insight as to who is behind the bombing, as can the explosives used. TATP is a jihadi favorite (AKA: "Mother of Satan"), but it tends to degrade over time, and older stock might not go off at all.

[The Cajun]

TATP

Old chemistry prof. called it *witch's brew*, very unstable.