An ICE spokeswoman declined to comment on specific cases citing privacy concerns but said that ICE "takes very seriously any and all assertions that an individual detained in its custody may be a U.S. citizen." She also noted that "ICE continually strives to ensure that its systems of records are accurate and up-to-date. When the agency receives evidence suggesting that information in its systems is inaccurate, steps are taken to ensure the accuracy of such information."