Feucht said in an interview with the news outlet: 'I think that she was just done. She didn't feel like anybody could do anything to help her. People need to know that even the littlest things can break someone.'
The day Bethany shot herself - October 19 - she spoke to a female friend, the Columbus Dispatch reported. Feucht recalled: 'She told her she loved her and that she was her best friend forever, but that she was going to kill herself when she got home.' The mother also said that her daughter's friend informed her several peers had frequently teased them.
It's unclear who the gun belongs to, the Dispatch reported.
Bethany's father and Feucht's ex-husband Paul Thompson told the newspaper in an interview that his daughter went through brain cancer in 2008.
He said that his daughter's uneven grin was caused by a tumor that was removed.
The father said fellow students noticed and several bullied Bethany, explaining: 'I think that's why she took [her life].'