The bomber or bombers (the profile for incidents such as these suggest a single male bomber) apparently responsible for sending explosive devices to George Soros, Barack Obama, Hilary Clinton, and former CIA director John Brennan at CNN’s New York headquarters, is likely to be caught soon.

First off, none of the explosive devices thus far sent were able to detonate. CNN and Soros’ security teams deserve particular credit here because they lack the formalized screening systems available to the Secret Service. These “left of boom” interceptions-before-detonation will provide a treasure trove of investigative material to the Secret Service and the FBI. Focusing on the packages’ origins, and their design, components, explosive type, and detonator systems, investigators will be able to narrow down who would have had the skill and training to construct them. That said, it is worth noting here that neither the Soros or the CNN devices detonated. That raises the prospect that the devices were made with faulty detonator-receiver connections.