MINNEAPOLIS • A suburban Minneapolis police officer who said she mistakenly drew her gun instead of her Taser when she fatally shot Black motorist Daunte Wright went on trial on manslaughter charges Wednesday, with a prosecutor saying Kim Potter had been trained how to avoid such deadly mix-ups but still got it wrong.

Potter’s lawyer, though, argued that she made an error, saying, “Police officers are human beings.” And he appeared to 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 April 11 in Brooklyn Center in a shooting that was recorded by her body camera. The white officer resigned two days later.

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 shot her gun or Taser 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 that a woman — presumably Wright’s passenger — answered and screamed, “They shot him!”