Police officer Betty Shelby, who shot and killed an unarmed black motorist, Terrence Crutcher, last September has been acquitted by a jury. 

Shelby had been charged with first-degree manslaughter.

While prosecutors said Shelby acted out of fear when she shot Crutcher, since Crutcher walked away from Shelby with his hands up instead of getting on the ground, the defense argued "she believed Crutcher was going to get a gun and she had to stop that threat."

"Let it be known that I believe in my heart that Betty Shelby got away with murder, and I don't know what was in the mind of that jury," said Crutcher's father, Joseph, after the ruling.

His sister, Tiffany, called for reform of the police department during the trial, saying that the video of the shooting showed the other officer caring more about Shelby than her brother. 

The jury was made up of eight women and four men — including three black jurors. 

The AP reports that Shelby is  "elated" and "ready to get back to her life." 

Ready to get back to her life at the cost of an innocent man's?