Ingrid Oliveira Bueno da Silva, a 19-year-old Call of Duty player also known as Sol, has reportedly been murdered by another professional gamer.
Brazilian news network R7 reports 18-year-old Guilherme Alves Costa, also known as Flashlight, stabbed da Silva in the São Paulo district of Pirituba earlier this week.
He allegedly filmed the crime and turned himself in at a police station half an hour later, confessing to everyone.
A video of his arrest reportedly includes someone asking why he committed this crime, to which he answers: "Because I wanted to."
He later professes to be sane, and had been planning da Silva's murder for two weeks.
The pair met each other online through playing games, with both being members of Call of Duty teams: da Silva belonging to FBI Esports (Fantastic Brazil Impact) and Costa to Gamers Elite.
Police have not ruled out a romantic relationship between the two.
In a statement to Screenrant, a FBI Esports spokesperson said: "She was an extraordinary person, whom we will remember every day that the sun rises, every day that the sunlight touches our body, every time we look at the Sun, we will remember her."
Costa's team, Gamers Elite, released a statement via Instagram distancing itself from Costa and the incident.
The group said Costa sent a video of the murder to its members via WhatsApp, as well as a PDF with messages of hate against Christians and mentions of terrorism.
The clan says its leadership informed the authorities and asked members not to share the video.
The statement claims Gamers Elite's relationship with Costa has only ever been one of virtual interaction, that members have never seen him in person and few have seen his face.
Women In Games Argentina released a statement to GamesIndustry.biz, condemning "acts of insidious violence against women that impact so hard in Latin America."
The group is campaigning to raise awareness of the call for justice, and to help prevent the story being presented as one about video game violence by non-games media.
"We don't want the media pointing out the victim as guilty of something to deserve it, nor the violence in video games to be used as a scapegoat," the statement continued. "Let the guilt fall where it belongs, in a patriarchal system that enables and pardons violence against women.
"Our heartfelt condolences and support to her family and friends."
Costa also reportedly created a 52-page book in which he writes about his "mission" of killing more people.
Police do not believe that he has killed anyone else involved in the game, adding that he has no criminal record and has been calm since his arrest.
Costa's arrest is temporary and he is expected to receive a psychiatric examination to assess the conditions under which he will stand trial.