An Oklahoma police officer facing charges in the shooting death of an unarmed black man has turned herself in.

FOX's Tonya J. Powers has the story:

Tulsa police officer Betty Shelby surrendered to authorities early this morning, just hours after prosecutors charged her with first-degree manslaughter in the death of Terence Crutcher.

Crutcher, who is black, did not have a gun when he was shot dead by police in a Tulsa street on September 16.

Shelby, who is white, was booked shortly after 1 a.m. today, and released 20 minutes later after posting $50,000 bond.

Prosecutors say she "reacted unreasonably" when she shot Crutcher.

Dashcam and aerial footage of the shooting and its aftermath showed Crutcher walking away from Shelby with his arms in the air.

Shelby's attorney says Crutcher was not following police commands.

Tonya J. Powers, FOX News.

Follow Tonya J. Powers on Twitter: @TonyaJPowers