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Prosecutors also alleged Pratt stockpiled weapons and battlefield gear, tried to obtain advanced missile technologies and acquire explosive devices -- including suicide drones and remote-controlled cars.

The court filing offered an intimate view of the roots of a terrorism investigation and a profile of an accused ISIS volunteer who wanted to leave America.

Prosecutors included photos of handwritten plans by Pratt to create an ISIS intelligence unit to "kill or kidnap without detection" and pictures of Pratt with firearms. That included an image of a loaded handgun federal agents found hidden within a dog food container during FBI raids across the region.