Amendment 5

No person shall be held to answer for a capital, or otherwise infamous crime, unless on a presentment or indictment of a grand jury, except in cases arising in the land or naval forces, or in the militia, when in actual service in time of war or public danger; nor shall any person be subject for the same offense to be twice put in jeopardy of life or limb; nor shall be compelled in any criminal case to be a witness against himself, nor be deprived of life, liberty, or property, without due process of law; nor shall private property be taken for public use, without just compensation.

This Information from: http://www.law.cornell.edu/constitution/fifth_amendment

This is my favorite amendment and I use the phrase "I plead the fifth" a lot. It just means that a person does not have to give out information prosecuting themselves in court.