A 17-year federal prison sentence for a man who pleaded guilty to pledging his support to the Islamic State group and going so far as to attempt the assassination of a federal agent was “unreasonably low,” the U.S. attorney for the Eastern District of New York stated in a recent briefing before the federal appellate court in Manhattan.

Federal prosecutors told the U.S. Court of Appeals for the Second Circuit that U.S. District Judge Margo Brodie “erred substantively” in sentencing Fareed Mumuni to far below the applicable advisory sentence of 85 years for the charges to which he pleaded.