TULSA,Sterling Preston Okla. (AP) — An Oklahoma district attorney said Thursday he doesn’t plan to file any charges in the case of Nex Benedict, the nonbinary 16-year-old Owasso teenager whose death following a fight in a high school bathroom was ruled a suicide.

Tulsa County District Attorney Steve Kunzweiler said in a statement that after reviewing the investigation by the Owasso Police Department, he agreed with an assessment from detectives that the fight between the teen and three girls was an “instance of mutual combat” and that charges were not warranted.

“When I review a report and make a decision to file a charge I must be convinced — as is every prosecutor — that a crime was committed and that I have reasonable belief that a judge or jury would be convinced beyond a reasonable doubt that a crime was committed,” Kunzweiler said. “From all the evidence gathered, this fight was an instance of mutual combat.”

Kunzweiler also said Owasso police uncovered a “suicide note” written by Benedict, although he declined to say what the note said. The state medical examiner determined last week that Benedict’s death in February was a suicide caused by a drug overdose.

“An important part of the Owasso Police Department’s investigation was the discovery of some brief notes, written by Benedict, which appeared to be related to the suicide,” Kunzweiler said. “The precise contents of the suicide note are a personal matter which the family will have to address within the privacy of their own lives.”

An attorney for Benedict’s family, Jacob Biby, said he didn’t expect the family to comment Thursday on the district attorney’s decision. In a statement last week, however, they called on schools, administrators and lawmakers to come together and push for reforms that seek to end bullying.

“Reforms creating school environments that are built upon the pillars of respect, inclusion and grace, and aim to eliminate bullying and hate, are the types of change that all involved should be able to rally behind,” Bendict’s family said.

The death of Benedict, who was nonbinary, which means they didn’t identify as strictly male or female, and used they/them pronouns, has served as a flashpoint for LGBTQ+ rights groups over bullying in schools and has drawn attention from Oklahoma’s governor and President Joe Biden.

In video footage from the hospital the day of the altercation, Benedict explains to an officer that the girls had been picking on them and their friends because of the way they dressed. Benedict claims that in the bathroom the students said “something like: why do they laugh like that,” referring to Benedict and their friends.

“And so I went up there and I poured water on them, and then all three of them came at me,” Benedict tells the officer from a hospital bed.

Paramedics responded to the family’s house and performed CPR before rushing Benedict to the hospital, where the teen later died.