Pentagon leak suspect Jack Teixeira boasted online he'd thought of everything and was untraceable, FBI investigator says. Now he faces decades in prison.

• The Pentagon leak suspect allegedly boasted on social media that he was untraceable and had thought of everything.
• But FBI investigators found him by asking Discord for the subscriber info connected to his username. 
• Teixeira is suspected of leaking hundreds of classified documents and faces up to 25 years in prison.

Suspected Pentagon leaker Jack Teixeira bragged online that he'd thought of everything and that no one would link the leak of hundreds of classified military intelligence documents to him, an FBI investigator revealed in newly released court documents. He was recently arrested and now faces over two decades in prison.