A civil rights group is demanding that the Binghamton, New York, school district apologize to four 12-year-old girls who say they were strip searched for drugs in school, according to the Associated Press. The NAACP Legal Defense Fund said in a letter to Binghamton school officials Thursday that a middle school nurse and principle violated the Constitutional rights of these girls, who are African-American. School district officials maintain that the girls underwent a medical evaluation but were not subjected to a strip search. The school district has hired lawyers to independently probe the allegations. New York Gov. Andrew Cuomo has asked the state Education Department to investigate the incident, per the AP. The alleged Jan. 15 strip search spurred a march in the onetime upstate manufacturing hub. Several months prior to the alleged incident, students claimed they heard a school security officer use the n-word during a confrontation with a student.