Nilton Ribeiro, a corrections officer at the Cumberland County Jail in Maine since 2023, was arrested by ICE agents on August 22, 2026, during a targeted enforcement operation. Originally from Angola, he entered the U.S. in September 2022 with permission to stay until March 2023, but DHS said he remained after that date expired. Sheriff Kevin Joyce called him 'a very good employee' and 'a very good corrections officer' who passed a rigorous hiring process, including a background check, polygraph test, and I-9 verification. Jail administrator Timothy Kortes said he met job expectations and had notified the jail of an immigration issue before missing work. Ribeiro remains in ICE custody pending removal proceedings. Sheriff Joyce said Ribeiro is at least the fourth Cumberland County Jail corrections officer or recruit detained by ICE in the past 16 months, including another recruit who had no known criminal history and was authorized to work in the U.S.