A fifth individual who was taken into custody by federal Immigration and Customs Enforcement (ICE) agents earlier this month on Nantucket was identified Thursday morning as Felix Angel Gabriel Deras-Mejia, a 30-year-old Salvadoran who the federal agency alleged is a documented MS-13 gang member illegally present in the United States. Deras-Mejia is facing two previous charges of assault and battery and one charge of disorderly conduct in Nantucket District Court.