Answer:
5th
Step-by-step explanation:
"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..."
5th Amedment, U.S Constitution
Bacically the constitution allows you to not answer the police officer if he asks you what happened, it is similar to Meranda Rights