This could have been a good TV-movie, but the flashbacks do not make it easier to understand the movie. As they give the viewer informations on the way (will the movie proceeds) i found myself wondering why she never said or mentioned that in the beginning. Then the whole trail would probably not have been necessary.
When the movie ends you understand why she shot, and of course she is not guilty. Too bad that the producer/director used the flashbacks this way, but on the other had the movie would not have been worth while at all.
Nice movie for a rainy day, big bag of chips to kill the evening.