system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can people admit to crimes on documentaries and not get convicted?

I watched a documentary called "How to get rich selling drugs". Everyone from dealers, Kingpins to Cartel Lords came on admitting to selling and distributing drugs. Shouldn't they be worried this info will be used against them?
gpt
They ~~couldn't~~ [Edit: probably wouldn't] be prosecuted on their statements alone. They would just plead the fifth and say they were lying before. To be prosecuted there would have to be physical proof of their illegal activity.