As Temple is giving her testimony she pauses when a voice from off-screen says "and then?" to get her to keep her story going. However, it is not the voice of the defense attorney (Stephen Benbow) who would be the only one who could speak to her at the time. Probably a late edit/dub.
The goof item below may give away important plot points.
When Temple shoots Trigger, the camera is focused on his right hand putting out a cigarette. After the second shot his body starts to drop down, though only his right arm is seen to go parallel to the ground. However, in the next shot his right arm is still vertical/perpendicular to the ground & he proceeds to fall again.