The policewoman had shot dead a young black man near Minneapolis on Sunday.
Kim Potter, charged with "manslaughter", was imprisoned Wednesday and then released at the end of the afternoon, against the payment of a bond which had been set at 100,000 dollars.
She will be presented to a judge on Thursday for a preliminary hearing, according to local media.
The 48-year-old white policewoman faces up to 10 years in prison if convicted of second-degree murder (unpremeditated intentional homicide).
The facts go back to Sunday.
Kim Potter opened fire on Daunte Wright, a 20-year-old African-American, during an ordinary traffic stop in Brooklyn Center, on the outskirts of Minneapolis.
She then assured to have confused her service weapon with her electric Taser pistol.
Minneapolis: renewed tension after the death of a young African American killed by the police
"We intend to prove that Agent Potter neglected her responsibility to protect the public when she used her service weapon rather than her Taser," responded the services of prosecutor Peter Orput.
The drama has rekindled tensions in Minneapolis, where the trial of white policeman Derek Chauvin, on trial for the murder of African-American George Floyd, is currently taking place.
On May 25, the agent remained kneeling for nearly ten minutes on the neck of the black forty-something, whose torture, filmed, had led to giant demonstrations around the world.
Death of George Floyd: the whole planet is mobilized against racism
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Kim Potter, 48, worked for 26 years with the Brooklyn Center Police Department, according to France 2 correspondents in Washington.
In her resignation letter, she claims to have "served this community to the best of her ability".
The lawyer who will represent her is also the counsel of Thomas Lane, one of the four officers involved in the death of George Floyd.
"We will continue to fight in order to obtain justice"
Anxious to avoid a new conflagration in Minneapolis, where several businesses and a police station had burned down at the end of May, the authorities had declared a curfew on Sunday evening and called for reinforcements from the National Guard.
Despite this device, clashes between the police and demonstrators have taken place every night since Sunday.
Move! ”, Shout the police officers who advance by forming a wall to chase away the demonstrators, who answer in vain“ Don't move!
Very quickly the crowd disperses.
End of 4th night of clash at #brooklyncenter #DaunteWright pic.twitter.com/YfewzKZWYl
- Olivier O'Mahony (@olivieromahony) April 15, 2021
The family of Daunte Wright took note Wednesday of the proceedings against the policewoman, but criticized her justifications: "An agent with 26 years of experience knows the difference between a Taser and a firearm", a their lawyer Ben Crump wrote in a statement.
“We will continue to fight to obtain justice for Daunte, her family and all marginalized people of color.
We won't stop until we get real police and justice reforms, ”added Crump, who also defends the Floyd family.
This is #DaunteWright and his son Duante Wright Jr.
Earlier today Duante Sr. was shot to death during a traffic stop reportedly about an air freshener obstructing a mirror.
He was 20 years old and killed by a Brooklyn Center Police Officer in MN.
He was unarmed.
- S. Lee Merritt, Esq.
(@MeritLaw) April 12, 2021
Without commenting on this file, the White House considered that "the police too often used unnecessary force and that this too often led to the death of African Americans" and recognized "the need of reforms ”.