Tovonna Holton stole a gun from her mother Levon Holton-Teamer’s handbag and shot herself in the family’s bathroom, according to her mother.
The 15-year-old from Florida was found dead hours after the footage was uploaded on the social media app.
Ms Holton-Teamer, who has posted pictures of her with her daughter on Facebook, said Tovonna locked herself in the bathroom.
She told WFLA-TV: ‘I couldn’t get in the bathroom.
‘The bathroom light was off so I tried to get in and I looked down and I saw the puddle of blood. I tried to apply the pressure, the pressure to her head. I tried to save her.’
She also spoke about the last conversation she had with her daughter.
‘Tovonna would say, ‘Mommy, I owe them; I owe them.’ I said, ‘What do you mean you owe them?’ I couldn’t understand what was wrong.’
After her death, Tovonna’s aunt Angel Scott discovered that bullies had shared the naked images of Tovonna.
She told the news station: ‘Everybody was out there talking about her and calling her names and they said it went up on social media, Snapchat. I’d never heard of that before about three-something that afternoon.
‘I want [the bullies] to pay, to feel what we feeling, even if their child is convicted or in trouble, they can go visit their child.’