Center for Constitutional Rights

The Center for Constitutional Rights is dedicated to advancing and protecting the rights guaranteed by the United States Constitution and the Universal Declaration of Human Rights. Founded in 1966 by attorneys who represented civil rights movements in the South, CCR is a non-profit legal and educational organization committed to the creative use of law as a positive force for social change.

Here is their Fact Sheets resource.

Here is their Video stream.

Here is a PDF from CCR called When An Agent Knocks. It is a thorough instruction manual about your rights and options and how to behave if you are being pursued by Law Enforcement.