Total propaganda. I nixed this idea over three and a half decades ago and there’s a reason for that. Just an Earth-Bound Misfit...
I remember the Ponderosa TV show as a little kid. Once little Joe went to San Fransisco and was shanghaied by the Chinese. Any Chinese spies caught by America should be immediately executed along with their enablers. Traitor Joe let several go.
The problem with executing spies is two fold.
1. You can’t question them fudther about their target, their network and whether they had internal help.
2. Corpses have little trade value.