Guyger fatally shot 26-year-old Botham Jean thinking he was an intruder in her own apartment last year. Jean, who was black and unarmed, was shot while watching TV and eating a bowl of ice cream.
In her first public comments about the shooting, Amber Guyger says she was scared Botham Jean was going to kill her when she shot him in his home last September.
The defense team for the white former Dallas police officer who fatally shot an unarmed black neighbor last September is expected to argue she was defending herself and the killing was a mistake.
Amber Guyger is believed to be the second Dallas police officer charged with murder in the past 45 years. She faces up to life imprisonment if convicted.