Karen C. Marquez Membreno is a 16-year-old Hispanic girl who was reported missing from Hyattsville, Maryland, with her missing date listed as September 9, 2025. Public missing-child notices identify her by the middle initial C. and list her as female, with black hair and brown eyes. The National Center for Missing & Exploited Children lists her case under NCMEC number 2061882 and NCIC number M628604368, placing the formal public record of her disappearance within the national missing-child
alert system. Those details form the quiet but urgent beginning of Karen’s case: a teenager from Prince George’s County was last known to be missing from Hyattsville, and her name was circulated so that anyone who might have seen her could help bring her home.
After Karen was listed as missing, the public notices emphasized that she may still be in Hyattsville or may travel to Adelphi, Maryland, a nearby community in Prince George’s County. That information is important because it gives the search a geographic focus without assuming where she is or why she may be there. The available online notices do not provide a detailed account of the circumstances leading up to her disappearance, such as what she was wearing, who last saw her, or whether she left from a home, school, or another location. What they do make clear is that the concern is serious enough for national and local agencies to ask the public for help, and that even a small observation from someone in Hyattsville, Adelphi, or the surrounding area could matter.
The agencies connected to Karen’s notice direct anyone with information to contact authorities rather than trying to investigate independently. NCMEC lists its 24-hour call center at 1-800-843-5678, also known as 1-800-THE-LOST, and the local law-enforcement contact is listed as the Prince George County Police Department in Maryland at 301-352-1200. Separate missing-child alert pages repeat the same core message: anyone with information about Karen’s whereabouts, no matter how insignificant it may seem, is urged to come forward because it could help investigators understand where she went after September 9, 2025.
Karen’s case remains a story told mostly through sparse public records: her name, her age, her missing date, her community, her physical description, and the possibility that she may still be close to Hyattsville or may have gone toward Adelphi. Behind those few lines is a young person whose safety matters deeply to her loved ones and to the community being asked to watch for her. In overview, this case centers on 16-year-old Karen C. Marquez Membreno, missing since September 9, 2025, from Hyattsville, Maryland; public notices describe her as a Hispanic female with black hair and brown eyes, say she may remain in Hyattsville or travel to Adelphi, and ask anyone with information to contact NCMEC or the Prince George County Police Department.Last Seen: Sep 9, 2025
