>>2514752 lb
DOD Directive 5525.5
... so this appears to legally give the Feds (NSA included) the authority to collect criminal evidence, the way I read this (Enclosure 2).
https://
fas.org/irp/doddir/dod/d5525_5.pdf
https://
ourguy.org/its-happening-right-now-d5-5-5-military-operations-in-california/