system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is Jury Nullification, and why do people refer to it as a "get out of jury duty" free card?
gpt
There's no legal mechanism to overturn a not guilty verdict - no amount of proof will do it. So essentially, a jury that decides they don't want to punish a criminal can just refuse to do so, even if shown video of him doing the deed and narrating a confession.

If you tell a prosecutor that you've heard of this power and plan to use it, you're not likely to be selected.