

If it is determined without a doubt that he’s an Agent, the government he spied for will be contacted to see if there are any deals to be made. If not, he will simply be prosecuted and jailed for later use. The fact that he is prosecuted and why will be made public, but the actual prosecution not for national security reasons.
If you use anything but TOR together with spoofed VPNs for “activism” against a government that would jail/kill you, you are being reckless.
If you use X for your activism, you’re not an activist you’re a fed honeypot.