KANSAS CITY, MO — A former Kansas City, Missouri, police officer will spend the rest of his life in prison after a jury found him guilty of murdering a 71-year-old man outside a Northland Walmart.
Taquiza Johnson, 49, said he acted in self-defense in the 2024 shooting death of Ronald Barnett. But after five days of testimony, a Platte County jury rejected that argument and convicted him.
The case centered on an argument in the store parking lot and whether Johnson had any legal basis to use deadly force. Prosecutors said Barnett was unarmed, drove away from the confrontation and was later followed by Johnson before the shooting.
Parking lot argument turned deadly near the Northland store
According to testimony described in court, the confrontation began when Johnson believed Barnett had driven too close to him while Johnson was walking across the Walmart parking lot. The two men exchanged words, and the dispute escalated from there.
Johnson testified in his own defense and told jurors that Barnett threatened his life. He also acknowledged that he knew Barnett was not armed. That detail became important as prosecutors argued there was no immediate threat that justified the shooting.
Authorities said the conflict did not end when Barnett drove off. Instead, prosecutors told the jury, Barnett later parked in a handicap space and Johnson followed him.
Prosecutors said Johnson followed Barnett before opening fire
In closing the case against Johnson, prosecutors argued that Barnett had already disengaged from the roadside dispute by driving away. They said Johnson then pursued him to another part of the lot and shot him to death before leaving the scene.
The state’s version of events was supported by surveillance video from the store, which jurors saw during the trial. That footage became a key piece of evidence as the jury weighed Johnson’s claim of self-defense against the account presented by prosecutors.
Platte County Prosecuting Attorney Eric Zahnd later said in a news release that the shooting was hard to understand given the setting: a busy Walmart parking lot during the middle of the day.
Self-defense claim failed after five days of testimony
Johnson took the stand and tried to convince jurors that he feared for his life. His defense centered on the idea that Barnett’s words and behavior created a threat serious enough to justify a deadly response.
The jury did not accept that explanation. After hearing five days of evidence, jurors returned a guilty verdict and cleared the way for a life sentence.
Missouri self-defense law was a central issue in the case. Zahnd said in his statement that verbal threats alone do not justify deadly force, and he added that name-calling is not enough either.
A former officer with a decade on the Kansas City police force
Johnson’s background also drew attention during the trial. Records and statements presented in the case showed that he served with the Kansas City Police Department from 2004 to 2014.
That decade of service made the verdict especially notable in a case that involved an officer once trusted with public safety. The shooting happened after he had left the department, but the conviction tied his past law-enforcement experience to conduct the jury found criminal.
Prosecutors did not present the case as a difficult split-second confrontation. Instead, they argued that Johnson made a choice to pursue Barnett, pull a gun and fire after the older man had driven away.
The verdict closes a case that shocked the Northland Walmart lot
The killing happened in broad daylight in a retail parking lot that would normally be filled with shoppers and employees. That setting, prosecutors said, made the violence stand out even more.
Johnson was convicted of murder and sentenced to life in prison following the jury’s decision in Platte County. Barnett, who was 71, was killed during what began as a parking lot dispute and ended with fatal gunfire.
The case leaves behind a criminal conviction, a life sentence and a reminder of how quickly a public argument can turn deadly when a gun is involved.