On her first day on the job, NYPD officer Megan Turner, the lone officer on the scene, shoots and kills the perpetrator of a supermarket hold-up. Since no gun was found on the perpetrator's person or at the scene and none of the witnesses could corroborate Megan's story definitively that the perpetrator was indeed wielding a gun, she is suspended from active duty. She is quickly albeit temporarily reinstated to the position of homicide detective because the spent shell casing from the bullet...