ROCHESTER — A South Coast couple has filed a federal civil rights complaint against Old Rochester Regional School District, alleging a male student who identifies as transgender repeatedly entered the girls' bathroom at Rochester Memorial Elementary School and peered at their nine-year-old daughter through a stall door.

The Title IX complaint, lodged with the U.S. Department of Education's Office for Civil Rights, was filed by attorney Sam Whiting of the Massachusetts Liberty Legal Center on behalf of parents Kerri and Luis Rivera, according to the filing posted by the Massachusetts Family Institute and a report in the New Boston Post.

The complaint alleges the male student followed the Rivera daughter into the girls' restroom on multiple occasions, looked under the stall to see her feet, asked "who's feet are those?" — then peered through the crack in the door and pushed the door open while she was on the toilet.

The Riveras say the school had already received complaints about the same student peering under stalls at other girls and took no action. When the parents raised the incident, the principal at Rochester Memorial allegedly told them the district was "legally required" to allow the boy into the girls' bathroom, the complaint states.

The filing asks the federal Office for Civil Rights to open an investigation, to discipline the offending student, and to bar male students from using girls' bathrooms in the district.

Massachusetts public schools have for years operated under state Department of Elementary and Secondary Education guidance instructing districts to allow students to use bathrooms and locker rooms consistent with their gender identity. The Trump administration's Department of Education has rolled back the prior federal interpretation of Title IX that extended the law's sex-based protections to gender identity, returning the statute to a biological-sex reading and opening the door to complaints like the Riveras'.

Old Rochester Regional is already named in a separate Moms for Liberty federal lawsuit challenging transgender-inclusive school policies at 32 Bay State schools.

The district did not immediately respond to requests for comment. Rochester Memorial serves roughly 500 students from kindergarten through grade six.

The allegations have not been adjudicated. The complaint is filed; the Office for Civil Rights has not yet announced whether it will open an investigation.