You can download the ACLU’s Know Your Rights pamphlet.
The pamphlet — "Know Your Rights: What to Do If You're Stopped by the Police, the FBI, the INS or the Customs Service" — contains information for citizens and non-citizens alike and is intended for those who feel at risk of becoming innocent targets of a government investigation.
The pamphlets can be viewed using Acrobat Reader in the following languages:
(Links go to the ACLU website)
For more information see the American Civil Liberties Union website.