Former sergeant testifies that he removed ammo from gun in Kim Potter's holster because of concerns she might harm herself after shooting Daunte Wright

• Mychal Johnson, an ex-Brooklyn Center police sergeant, testified in Kim Potter's manslaughter trial.
• Potter is charged in the shooting death of Daunte Wright during an April traffic stop.

Kim Potter's former supervisor said in court on Friday that he'd taken a gun from Potter's holster and unloaded it because of concerns that she might harm herself after shooting Daunte Wright.

Potter, a former police officer, is on trial for charges of first- and second-degree manslaughter in the April shooting death of Wright in Brooklyn Center, Minnesota. Potter has pleaded not guilty to both charges. She said she intended to grab her Taser, not her gun, before she fatally shot Wright in the chest.

Mychal Johnson, a former Brooklyn Center police sergeant who was present during the traffic stop where Potter shot Wright, testified in Potter's trial on Friday.

Footage from Johnson's body camera that was played in court showed Potter collapsing to the ground after shooting Wright, saying, "I'm going to prison." Potter then stood up and walked to a fence a few feet away, which she leaned against as she repeatedly said, "Oh my god! What am I going to do?" the footage showed.

The footage showed Johnson approach Potter and ask the officer to hand him her gun, to which Potter responded, "Just let me kill myself, Mike."

"No, that's not happening, Kim," Johnson responded.

A media pool report said Potter shook and cried before burying her head in her hands as the body-camera footage played in the courtroom.

Johnson testified that he took Potter's gun from her holster and put his gun in its place because of "her mental state of not knowing what she might do."

"I knew that her firearm was a piece of evidence at that time," Johnson said in court. "So I removed her firearm and put it in my holster, and put my gun in her holster, just so that that evidence was preserved."

Another officer, Colleen Fricke, had told Johnson that she was afraid Potter might hurt herself, Johnson testified. The former sergeant's body-camera footage showed that Fricke asked Johnson, "Can we mute this?" before the audio cut out on the footage.

Johnson testified that as Potter sat in the back of a squad car, he approached her and "discreetly asked" if he could take his firearm from her holster.

"I was able to turn away from her with my firearm, remove the magazine from it and the one round that was in the chamber," without Potter seeing, Johnson told the court.

Potter faces a maximum of 25 years in prison if convicted on both charges.