Teixeira faces two counts: The unauthorized retention and transmission of national defense information and the unauthorized removal and retention of classified documents or material, according to the criminal complaint against him.
Teixeira was represented by a federal public defender and ordered held pending a detention hearing.
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Read more coverage of the case:
- Guardsman charged with leaking classified documents appears in shackles in Boston courtroom
- Jack Teixeira, suspect in documents leak probe, recalled as history buff with keen interest in military
- Mass. Guardsman arrested in leak of US intelligence documents
- Security experts question how Guardsman allegedly gained access to sensitive intelligence data