It's occasionally upheld by the supreme court, occasionally overturned. It's defacto legal because it's unprovable. Also, it's worth noting that it's not exactl

It's occasionally upheld by the supreme court, occasionally overturned. It's defacto legal because it's unprovable. Also, it's worth noting that it's not exactly a panacea - the two big (in terms of scale) uses of it in the USA were northern jurors refusing to convict those who sheltered runaway slaves under the fugitive slave act (good) and the southern jurors who acquitted lynchers (bad). US link is more helpful http://en.wikipedia.org/wiki/Jury_nullification_in_the_United_States http://en.wikipedia.org/wiki/Jury_nullification_in_the_Unite... Judges and lawyers hate it, but at worst it's grounds for dismissal from a jury, not a crime.