A 13-year-old who once wrote an award-winning essay on gun violence was struck by a stray bullet and killed Monday night, CNN reports.

Sandra Parks was sitting in her bedroom in Milwaukee on Nov. 20 when the bullet shattered her window before hitting and killing her around 8pm CT.

Parks was an eighth grader at Keefe Avenue School. Two years ago, she wrote an essay that won third place in a contest honoring Martin Luther King Jr. Her essay, titled “Our Truth,” discussed the violent state of her city and lamented that “little children are victims of senseless gun violence.”

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Källa: Sandra Parks, Who Wrote an Essay on Gun Violence, Shot and Killed