TULSA, Okla. (AP) -- Prosecutors charged a white Oklahoma police officer with first-degree manslaughter Thursday, less than a week after she killed an unarmed black man on a city street and just days after police released graphic videos, saying in court documents the officer "reacted unreasonably."
Tulsa officer Betty Shelby fatally shot 40-year-old Terence Crutcher on Sept. 16. The affidavit filed with the charge says Shelby "reacted unreasonably by escalating the situation from a confrontation with Mr. Crutcher, who was not responding to verbal commands and was walking away from her with his hands held up, becoming emotionally involved to the point that she over reacted."
Tulsa County District Attorney Steve Kunzweiler said arrangements were being made for Shelby's surrender.
The swift action in Tulsa stood in contrast to Charlotte, North Carolina, where police refused under mounting pressure Thursday to release video of the shooting of another black man this week and the National Guard was called in to try to a head off a third night of violence. Demonstrations in Tulsa since Crutcher's death have been consistently peaceful.
Dashcam and aerial footage of the shooting and its aftermath showed Crutcher walking away from Shelby with his arms in the air. The footage does not offer a clear view of when Shelby fired the single shot that killed Crutcher. Her attorney has said Crutcher was not following police commands and that Shelby opened fire when the man began to reach into his SUV window.
But Crutcher's family immediately discounted that claim, saying the father of four posed no threat to the officers. They also pointed to an enlarged photo from police footage that appears to show Crutcher's window was rolled up. And police said Crutcher did not have a gun on him or in his vehicle.
The affidavit filed Thursday also indicates that Shelby "cleared the driver's side front" of Crutcher's vehicle before she began interacting with Crutcher, suggesting she may have known there was no gun on the driver's side of the vehicle.
The affidavit says Shelby told police homicide investigators that "she was in fear for her life and thought Mr. Crutcher was going to kill her. When she began following Mr. Crutcher to the vehicle with her duty weapon drawn, she was yelling for him to stop and get on his knees repeatedly."
Crutcher was wearing "baggy clothes" but Shelby "was not able to see any weapons or bulges indicating a weapon was present," the affidavit states.
Prosecutors offer two possible theories in charging documents: that Shelby killed Crutcher impulsively in a fit of anger or that she wrongly killed him as she sought to detain him. The case first goes to a judge, who will decide whether there is enough evidence for a trial. Lee F. Berlin, a Tulsa-based defense lawyer and a former assistant district attorney in Oklahoma, said prosecutors may at some point decide to move forward with only one of the theories or could present both to jurors and let them decide.
If convicted, Shelby faces between four years and life in prison.
Crutcher's twin sister, Tiffany Crutcher, said the family was pleased the criminal charge was filed and urged a vigorous prosecution that leads to a conviction.
"Our goal now is to ensure that this never happens to another innocent citizen," Tiffany Crutcher said. "We're going to break the chains of injustice. We're going to break the chains of police brutality."
Tulsa Mayor Dewey Bartlett said police worked quickly to provide Kunzweiler with the information he needed to decide whether to charge the officer.
"I appreciate their efforts as well as the District Attorney's usual thorough evaluation of the rules of law for which we are all accountable," Bartlett said in a written statement. "We will continue to be transparent and ensure the system carries out its responsibility to provide justice."
Shelby, who joined the Tulsa Police Department in December 2011, was en route to a domestic violence call when she encountered Crutcher's vehicle abandoned on a city street, straddling the center line. Shelby did not activate her patrol car's dashboard camera, so no footage exists of what first happened between the two before other officers arrived.
The police footage shows Crutcher approaching the driver's side of the SUV, then more officers walk up and Crutcher appears to lower his hands and place them on the vehicle. A man inside a police helicopter overhead says: "That looks like a bad dude, too. Probably on something."
Police Sgt. Dave Walker has said investigators found a vial of the drug PCP in Crutcher's vehicle. Shelby's attorney, Scott Wood, has said that Shelby completed drug-recognition expert training and thought Crutcher was acting like he might be under the influence of PCP.
Attorneys for Crutcher's family said the family didn't know whether drugs were found in the SUV, but that even if they were, it wouldn't justify the shooting.
A toxicology report could take several weeks.
Wood did not immediately return phone messages seeking comment about Shelby being charged.
In the videos, the officers surround Crutcher and he suddenly drops to the ground. A voice heard on the police radio says: "Shots fired!" The officers back away and Crutcher is left unattended on the street for about two minutes before an officer puts on medical gloves and begins to attend to him.
"The tragic circumstances surrounding the death of Mr. Crutcher are on the hearts and minds of many people in this community," Kunzweiler said. "It's important to note that despite the heightened tensions felt by all, which seemingly beg for an emotional response and reaction, our community has consistently demonstrated the willingness to respect the judicial process."
At least two dozen people gathered outside the courthouse after the district attorney announced the officer was charged. Later, a peaceful rally was held in front of City Hall. Some demonstrators expressed disappointed Shelby wasn't charged with first-degree murder, but others considered Thursday's announcement a victory.
"Today we can say without a shadow of a doubt that the system has worked for black lives," said activist Marq Lewis, an organizer of the civil rights group We the People Oklahoma, which led the rally in front of City Hall. "We are getting something done in Tulsa that no other city is getting done."
Earlier this year, a white former volunteer deputy with the Tulsa County Sheriff's Office was sentenced to four years in prison after he was convicted of second-degree manslaughter in the shooting death of Eric Harris, who was also black and unarmed.
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Murphy reported from Oklahoma City. Associated Press writers Michael Tarm in Chicago and Ken Miller in Oklahoma City contributed to this report.