Though her obvious remorse and the totality of circumstances can be a factor in regards to her sentence, I think some prison is appropriate and needed.I don't think that prison is appropriate. I do think that it is time for her to retire.
At the end of the day, the defendant was not say, hired as a flight attendant- then tossed a technical maintenance manual and told to trouble shoot a plane's auto pilot.
Rather, she choose to be a police officer, was functioning as a police officer and had received sufficient training to distinguish between a taser and a fire arm (was even a training officer herself).
Likewise, she was performing a duty that was well with in her training level and experience level. She was not say, suddenly ordered to join a Swat team with no Swat training or experience that was attempting to rescue hostages from a barricaded suspect.
For me, the totality of having sufficient training for the job and also performing a duty with in her experience level holds her to a higher level of responsibility. I would find her guilty, then factor the totality of the circumstances towards how long a sentence should be.