MINNEAPOLIS (KCAU) — The trial of a Minnesota police officer who shot and killed a 20-year-old man during an arrest opened Wednesday in Minneapolis.

Prosecutors building their case against a suburban Minneapolis police officer who killed Black motorist Daunte Wright repeatedly played body-camera video of the fatal shooting, with the officer heard shouting “Taser!” and then collapsing in wails of “Oh my God!” after she had instead fired her handgun.

They used their opening statement Wednesday to portray Kim Potter as a veteran cop who had been repeatedly trained in Taser use, including warnings on avoiding such deadly mix-ups.

Potter’s attorney countered that she made an error, saying, “Police officers are human beings.” And he cast blame on Wright, saying all the 20-year-old had to do that day was surrender.

Potter, 49, killed Wright, who wasn’t armed, during a traffic stop on April 11 in Brooklyn Center. The white officer resigned two days later. She’s charged with manslaughter.

Jurors saw video from officers’ body cameras and the police car dashboard that showed Potter threatening to shoot Wright with a Taser as another officer tried to pull him out of his car. After she shot him with her gun, Potter can be heard saying, “I just shot him. … I grabbed the wrong (expletive) gun!”

A car crash can be heard after Wright drives away and Potter — who defense attorney Paul Engh said had never fired her gun or Taser while on duty in her 26-year career — can be heard wailing uncontrollably afterward, “Oh my God. Oh my God!” before she crumples over.

Wright’s mother, Katie Bryant, testified about the moment she saw her son lying in his car after he’d been shot. She said she tried to contact him through a video call after losing an earlier phone connection, and a woman — presumably Wright’s passenger — answered and screamed, “They shot him!” and pointed the phone toward the driver’s seat.

In this image taken from pool video, Katie Bryant, the mother of Daunte Wright, testifies Wednesday, Dec. 8, 2021, at the Hennepin County Courthouse in Minneapolis, Minn. ,in the trial of former Brooklyn Center police Officer Kim Potter in the April 11, 2021, death of Daunte Wright, (Court TV, via AP, Pool)

“And my son was laying there. He was unresponsive and he looked dead,” Bryant said through tears.

mostly white jury was seated last week in the case, which sparked angry demonstrations outside the Brooklyn Center police station last spring just as former Minneapolis Officer Derek Chauvin was on trial 10 miles (16 kilometers) away for killing George Floyd.

Engh told jurors that Potter made a mistake when she grabbed the wrong weapon and shot Wright after he attempted to drive away while she and other officers were trying to arrest him.

The charges don’t require proof that Potter intended to kill Wright, and prosecutor Erin Eldridge noted as much for the jury.

But Engh also told jurors that Potter would have been justified in shooting Wright even if she had consciously chosen to draw her handgun, arguing that deadly force was warranted to protect her fellow officers. He said police had reason to believe that Wright might have a gun and that one of the officers had reached inside Wright’s car and was at risk of being dragged if Wright drove away.

In her opening statement, Eldridge told jurors that Potter violated her extensive training — including on the risks of firing the wrong weapon — and “betrayed a 20-year-old kid.”

“This is exactly what she had been trained for years to prevent,” Eldridge said. “But on April 11, she betrayed her badge and she failed Daunte Wright.”

Potter, who has told the court she will testify, was training a new officer when they pulled Wright over for having expired license plate tags and an air freshener hanging from the rearview mirror.

The memorial site for Daunte Wright sits covered in snow on Wednesday, Dec. 8, 2021, in Brooklyn Center, Minnesota as opening statements begin in the trial for former police officer Kim Potter. (AP Photo/Christian Monterrosa)

The officer Potter was training that day, Anthony Luckey, testified that during the stop, he smelled marijuana and saw marijuana residue on the car’s console. He also said Wright didn’t have a license and produced an expired proof of insurance that was under another person’s name.

After discovering there was a warrant for Wright’s arrest on a weapons charge and a restraining order against Wright, Luckey said he was going to put Wright in handcuffs and check on the welfare of the woman in the car, and he asked Wright to get out.

But as Luckey tried to handcuff him, Wright struggled out of the officer’s grip and got back into the car. Luckey said he was reaching into the car when he heard the gunshot, and that he then jumped back and saw Wright put the car in drive before it took off.

Prosecutors say Potter had extensive training, and it included an explicit warning about confusing a handgun with a Taser that also directed officers “to learn the differences between their Taser and firearm to avoid such confusion.”

Eldridge told jurors that officers are required to carry their Taser on their nondominant side and their firearm on their dominant side. Potter carried her gun on her right and her Taser on her left, where it was in a “straight draw” position to be drawn with that left hand.

“The only weapon she draws with her right hand is her gun, not her Taser,” Eldridge said.

The most serious charge against Potter requires prosecutors to prove recklessness, while the lesser requires them to prove culpable negligence. Minnesota’s sentencing guidelines call for a prison term of just over seven years on the first-degree manslaughter count and four years on the second-degree one. Prosecutors have said they will seek a longer sentence.

Gov. Tim Walz said Wednesday he is preparing the National Guard to help with security if needed after a verdict in the case.