An Orange County judge on Friday threw out the criminal indictment against a Mission Viejo dermatologist accused of trying to poison her husband with drain cleaner, ruling that prosecutors withheld evidence that could have helped her defense. Yue "Emily" Yu was arrested in 2022 after her husband said hidden-camera footage showed someone pouring a plumbing chemical into his drink and later reported serious stomach issues. The decision halts the current criminal case for now, although prosecutors still have the option to try again.
Judge Tosses Indictment Over Withheld Evidence
Orange County Superior Court Judge Patrick Donahue dismissed the indictment after finding that prosecutors had held back evidence "that could have potentially cleared the accused," according to NBC Los Angeles. That conclusion followed defense complaints about what grand jurors were shown, and whether leads that might have helped Yu were ever fully explored.
Allegations Traced Back To 2022 Hidden Video
The allegations stretch back to the summer of 2022, when Yu’s husband, Dr. Jack Chen, said he began tasting a chemical flavor in his lemonade and was later diagnosed with stomach ulcers, gastritis and esophagitis. Chen told investigators he installed surveillance cameras that prosecutors say captured Yu pouring liquid drain cleaner into drinks, and prosecutors said samples from the scene were tested by federal agents, according to the Los Angeles Times.
Defense: Grand Jury Questions Went Unanswered
Yu’s attorneys, Scott Simmons and Dan Wagner, argued that grand jurors themselves had asked prosecutors to dig into information that could favor the defense and were turned down. "Emily Yu should not have been indicted," Simmons told the court, calling the grand jury process that led to the charges "fundamentally flawed," according to NBC Los Angeles.
A Superseding Indictment And Ongoing Fight
Yu was first indicted in 2023 on three counts of poisoning and one count of corporal injury, and a new grand jury indictment unsealed in January 2026 added attempted poisoning counts. The January hearing, where a judge signed off on the fresh indictment while tossing the earlier one, triggered the latest round of legal sparring, according to Patch.
Family And Professional Fallout
Defense lawyers say Yu has not practiced medicine while the criminal case has been hanging over her and that her in-person visits with her children have been limited amid separate custody battles. Those family court fights have at times overlapped with the criminal allegations, according to reporting by the Los Angeles Times.
What Happens Next
It is not yet clear whether the Orange County District Attorney will try to refile charges. Judges have previously allowed prosecutors to seek a new indictment in this case, and Yu’s legal team says it will move quickly to challenge any attempt to bring the case back, according to MyNewsLA.
For now, the dismissal is a sharp, unexpected pause in a case that has drawn steady attention in local courtrooms and online. Both the criminal saga and the underlying custody fight are likely to stay active as prosecutors, defense attorneys and family lawyers decide their next move.
