Espionage can be illegal and punishable by law in some circumstances.
Notes on verification
Well-corroborated by multiple legal sources (Cornell Law, federal statutes, Wikipedia) confirming espionage is illegal and punishable, including severe penalties like life imprisonment or death in the US.
Sources
- Espionage (en.wikipedia.org)
- https://www.law.cornell.edu/wex/espionage (law.cornell.edu)
- https://www.egattorneys.com/federal-espionage-crimes (egattorneys.com)
- https://www.federalcharges.com/espionage-laws-charges/ (federalcharges.com)