In US, the jury can choose: guilty or not, but CGP Grey says that there is a third option: jury nullification. Jury nullification: when the defendant is 100% guilty, but the jury thinks he shouldn’t be punished.
Talking about nullification can get you arrested, so watch out. Also, jury nullification is not in the law, but exists as a logical consequence of two laws: jury can’t be punished for a wrong decision and when a defendant has been found as not-guilty he can’t be tried again for the same crime.
So, yeah. Never knew that nullification is an option. In any case, if they find out that you know about this, you will not be called to jury duty.