Jury Nullification:

Amendment VI

In all criminal prosecutions, the accused shall enjoy the right to a speedy and public trial, by an impartial jury of the State and district wherein the crime shall have been committed, which district shall have been previously ascertained by law, and to be informed of the nature and cause of the accusation; to be confronted with the witnesses against him; to have compulsory process for obtaining witnesses in his favor, and to have the Assistance of Counsel for his defence.

The Words of the Founding Fathers

Jurors should acquit, even against the judge's instruction...
if exercising their judgement with discretion and honesty
they have a clear conviction the charge of the court is wrong.
Alexander Hamilton, 1804

It is not only the juror's right, but his duty to find the verdict
according to his own best understanding, judgement and conscience,
though in direct opposition to the instruction of the court.
John Adams, 1771

I consider trial by jury as the only anchor yet imagined by man
by which a government can be held to the principles of its constitution.
Thomas Jefferson, 1789

It will be of little avail to the people that the laws are made
by men of their choice, if the laws are so voluminous that they
cannot be read, or so incoherent that they cannot be understood;
if they... undergo such incessant changes that no man who knows
what the law is today can guess what it will be tomorrow.
James Madison

LINKS
Juror's Handbook
FIJA : The Fully Informed Jury Association
The Jury Rights Project
History of Jury Nullification
The Citizen's Rulebook
Jury Nullification and the Rule of Law
Try the Law
Jury Nullification
Jury Rights
An Essay on the Trial by Jury (1852)