A California appeals court has overturned the murder conviction of a man in a 2019 stabbing at a Bay Area Rapid Transit (BART) station, ruling that the jury was not properly instructed on self-defense. The decision, issued on June 19, 2026, by the First District Court of Appeal, vacated the second-degree murder conviction of John Smith, who was found guilty in 2022 for the fatal stabbing of Mark Johnson at the MacArthur BART station in Oakland.
The court found that the trial judge failed to adequately instruct the jury on the legal standards for self-defense, particularly regarding the defendant's right to use force if he reasonably believed he was in imminent danger. The appeals court ordered a new trial, stating that the error was not harmless and could have affected the verdict.
According to court documents, the stabbing occurred on July 22, 2019, during an altercation on a BART platform. Smith claimed he acted in self-defense after Johnson threatened him with a knife. Prosecutors argued that Smith was the aggressor and used excessive force. The appeals court did not rule on the facts of the case but focused on the legal instructions given to the jury.
The Alameda County District Attorney's office has not yet announced whether it will retry the case. Smith's attorney welcomed the decision, saying it upholds the principle that defendants are entitled to a fair trial with proper legal guidance. The case has drawn attention to issues of self-defense law and jury instructions in California.
