In December 2022, “Girl X” also confided in “Boy Y” that she was “obsessed” with Brianna, whom she had met about a month earlier, according to prosecutors. Brianna was born as a boy, but was living as a girl and using female pronouns, they said. By January, however, “X’s fascination with Brianna had turned darker,” prosecutors said, leading her to confide in “Boy Y” that she had tried to kill Brianna with an overdose of ibuprofen tablets.
People “already know she is depressed,” “Girl X” wrote in a message to “Boy Y” on Jan. 23, indicating that she believed others were likely to get suspicious. But “for some reason she has a high tolerance like I gave her some today that should have been enough to kill her,” she added. Although Brianna had felt ill and vomited, “she didn’t die,” “Girl X” said in the message. According to the documents, Brianna’s mother confirmed her daughter had been sick that week, and that her vomit had contained what she thought were grape skins but could have been the remnants of ibuprofen tablets.
In the following days, the two teens continued discussing various methods for killing Brianna, as well as four other people they knew, according to prosecutors, and by late January, had formulated their plan to stab her in the park. On Feb. 10, “Girl X” told “Boy Y” that she had sent a message to Brianna encouraging her to come to the park the following day to take drugs, and that Brianna had confirmed she would be there at 1 p.m. “Boy Y” confirmed he was bringing his hunting knife, prosecutors said.
Brianna, who had red hair and glasses, and that day wore a short gray tartan skirt, long white socks and a fluffy white hooded jacket, left home around 12:45 p.m. on Feb 11, according to prosecutors. About an hour after leaving home, Brianna, who according to her mother, rarely went out alone, texted her mother: “I’m on the bus by myself, I’m scared.”
