If you are arrested by local police, they must charge you with a crime in court within 48 hours (not counting weekends and holidays), or else release you. If police do file criminal charges, then you must still be released if the charges are dropped, you are granted and post bail, you win your criminal case, or you complete your sentence. Even then, the police or jail can hold you for another 48 hours if Immigration has placed a "detainer" on you. If Immigration has not picked you up within this 48 hours, then they must release you. If the police do not file criminal charges and if DHS does not file a detainer, call an attorney or community organization to help you get released from police custody. You have: a. Right to obtain counsel b. Right to list of legal service providers c. Right to Request a hearing before an Immigration Judge d. Right to contact your Consulate e. Right to examine evidence f. Right to notice of hearing and fundamental fairness g. Right to Competent Translation You have a right NOT to sign any statements or documents, especially ones giving up your right to a hearing in front of an immigration judge.