The inquest into Brianna's death has started. Such a sad case.
The inquest also heard about the mental health problems Brianna had before she was killed.
In a statement read to the court, her mother, Esther Ghey, described how Brianna was hyperactive when she was growing up, before she began living as a girl.
Ms Ghey said her daughter began struggling with her mental health from the age of 14, but refused to engage with the Child Adolescent Mental Health Service.
Brianna then developed an eating disorder that resulted in her being hospitalised, the inquest heard.
At one stage Brianna would go for weeks without washing or brushing her teeth, became totally isolated, and was referred for treatment for ADHD and diagnosed with autism, her mother said.
"I feel she was let down by the lack of mental health treatment," Ms Ghey added.
While at an eating disorder clinic, staff noticed Brianna had been self-harming, with marks on her arms and legs.
"She would cut her arms and legs - at one point she carved a row of love heart shapes on her arm," Ms Ghey's statement said.
The hearing was also told that when Brianna wanted to transition, she had threatened to kill herself if she did not receive hormone medication.
Ms Ghey said she tried to hold off for as long as possible due to concerns about the long-term effects of such medication, but eventually felt she had to agree.
“I don’t know if she would have [taken her own life] but I couldn’t take the risk," she said.
Brianna started taking puberty blockers and oestrogen that Ms Ghey ordered from an online service.
Her mother said Brianna’s mental health deteriorated in lockdown and she began to live her life mainly online.
She looked at Twitter accounts that promoted eating disorders and self-harm.
After lockdown, Brianna did not attend lessons in school because of anxiety.
At one stage, Ms Ghey took Brianna’s phone off her and said she seemed so much happier, describing her at the hearing as “a different child".