SALT LAKE CITY (AP) — The family of a 10-year-old girl who died by suicide has accused the Davis School District of not doing enough to protect their daughter and sister. They assert she was bullied “for being black and autistic.”

The district has recently been reprimanded by the U.S. Department of Justice for negligence concerning racial discrimination.

This week, Salt Lake City Police confirmed they are investigating the weekend death of Isabella “Izzy” Tichenor as a suicide. Her death has generated widespread outrage. Utah Jazz star shooting guard Donovan Mitchell called the case “sickening.”

In a statement, Tichenor’s family said they reported the bullying to teachers, as well as school and district administrators, but nothing was done to stop the harassment, per reports.

“Nothing was done to protect Izzy,” the family said in a statement. “Children did not have their behavior corrected so the torment of this child continued day after day.”

Shauna Lund, a spokeswoman for Davis School District, said Foxboro Elementary School in North Salt Lake “worked extensively with the family” and that the administration responded appropriately to the reports of bullying. Lund declined to share any further details to uphold the family’s privacy.

“We, like everyone, are devastated by the death of this child,” Lund said in a statement. “Our hearts go out to the family. Foxboro Elementary has worked extensively with the family and will continue to provide help to them and others impacted by this tragedy.”

Several hundred people gathered at a vigil Tuesday night to remember Izzy as a giggly girl who loved Hatchimals, coloring books and the color purple, per reports.

“I’m not going to let her name fade,” said Izzy’s mom, Brittany Tichenor-Cox.

She spoke from a podium draped in a Black Lives Matter flag with a large picture of Izzy in a dress smiling with the words #standforizzy at the bottom. Izzy’s 7-year-old brother Jackson also spoke.

“I miss Izzy. She is my sister, and I love her,” he said. “She would help me when I would get bullied.”

Izzy’s death comes about two weeks after a federal civil rights investigation found widespread racial harassment of black and Asian American students at Davis School District, including hundreds of documented uses of the N-word and other racial epithets over the last five years.

Black students throughout the district told investigators about similar experiences of white and non-black students calling them the N-word, referring to them as monkeys or apes and saying that their skin was dirty or looked like feces, according to the department’s findings. Students also made monkey noises at their Black peers, repeatedly referenced slavery and lynching and told black students to “go pick cotton” and “you are my slave.”

District officials admitted to federal investigators that their discipline data from at least four years revealed that staff treated students of color differently than white students, but the district did nothing to correct these disparities, according to the department.

The district acknowledged in a statement the investigation revealed incidents that “were not handled appropriately” and pledged to resolve any previous complaints. Black and Asian American students are each roughly 1 percent of the approximately 73,000 students enrolled in this school district.