Brown-Turner was born on February 11, 2001, in
Oxon Hill, Maryland. She attended
Bishop McNamara High School and was a top player for the
basketball team, being a three-time first-team all-conference choice and being ranked
ESPN's No. 15 prospect nationally. As a
junior, she helped the school to a record of 21–7 while being named first team All-Met by
The Washington Post. She averaged 16.0 points and 7.3 rebounds per game, receiving a number of honors including selection to the
McDonald's All-American Game and
Jordan Brand Classic, All-County and Naismith third-team
All-America honors, and Maryland Girls' Basketball Player of the Year, Bishop McNamara female student-athlete of the year and
Gatorade Maryland Player of the Year honors. She ended as Bishop McNamara's all-time leading scorer and committed to play
college basketball for the
NC State Wolfpack. ==College career==