Federal immigration officials say they will not deport immigrants pursuing legitimate civil rights claims, a move hailed by advocates as a way to protect a vulnerable population while critics say it encourages abuses. The U.S. Immigration and Customs Enforcement issued a memo Friday that “absent special circumstances,” it is against the agency’s policy to deport immigrants in the midst of a legitimate effort to protect their civil rights. ICE officials said the memos were designed to provide guidance on exercising appropriate discretion.