The FBI has closed its case on the Austin mail bomber who terrorized the Texas city last year, but agents were not able to deduce a motive behind the five explosions, which killed two people and injured at least five.
KXAN Austin reports that the FBI closed its case on the bomber on January 10th, nearly a year after the bomber blew himself up using one of his own packages. The Bureau has remained largely secretive about the case, releasing only a handful of details to the public over the course of the investigation.
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