A major trove of Legal Resources is available at The National Lawyers Guild .
The NLG has acquried expertise in 911 issues relating to health, survivor, displacement, etc problems and difficulties.
They are also a long-time advocate, and remain actively involved in assisting those charged at protest actions and are aware of our continued civil rights erosions as they fight for openness and accountability by authorities at all levels of government.
Some of their informational documents are here:
Dealing with the Police: General Guidelines for Activists
Questions and Answers About Civil Disobedience and the Legal Process
A list of regional contact information is forthcoming. You may always call their New York main office, or a regional office, for a referral.