Legislation introduced by Rep. Gary Holder-Winfield would close what he calls a loophole in the the state’s immigration policy which led to deportation proceedings against an immigrant living in New Haven. Despite a policy enacted last year by Gov. Dannel P. Malloy, judicial marshals turned over Mexican immigrant Josemaria Islas federal immigration authorities, who have been pursuing his deportation. Malloy ordered Department of Corrections staff and State Police not to honor the Immigrations and Customs Enforcement agency’s Se Communities “detainer” requests unless the person in question poses a serious threat to national security or public safety. Islas was arrested when police charged him with robbery. He took advantage of a judicial program under a lesser charge and was expected to be released. But marshals, who work for the Judicial Branch rather than one of Malloy’s executive agencies, turned Islas over to ICE.