Judge again dismisses poisoning case against OC dermatologist

An Orange County judge has dismissed all seven felony charges against a California dermatologist accused of poisoning her estranged husband's tea with drain cleaner, ruling that prosecutors suppressed exculpatory evidence and improperly removed grand jurors while securing an indictment.

Orange County Superior Court Judge Patrick Donahue ruled Friday that prosecutorial misconduct compromised grand jury proceedings, marking the second time a court has thrown out a criminal case stemming from allegations that Dr. Yue "Emily" Yu poisoned her husband in 2022. The Orange County District Attorney's Office said it intends to refile the charges. People v. Yu, 26ZF0001 (O.C. Super. Ct. filed Jan. 6, 2026); People v. Yu, 23ZF0002 (O.C. Super. Ct. filed March 20, 2023).

Attorney Scott Simmons of Simmons Wagner LLP, who represents Yu, said the case was dismissed twice -- first after prosecutors sought dismissal because of witness issues, and again after the defense successfully challenged errors in the grand jury proceedings.

"The DA's office had a witness problem and asked the court to dismiss the case in the interest of justice, which the court did. The DA's office then filed a superseding indictment and proceeded on that second indictment. But there were major errors committed during the grand jury proceedings, so we brought our 995 motion, and the court granted it. That's now two dismissals."

The Jan. 6 indictment, returned by the 2025-26 Orange County grand jury, charged Yu with seven felonies. Count 1 alleged domestic battery resulting in corporal injury under Penal Code Section 273.5(a) between March 1 and June 25, 2022, against a spouse identified as John Doe.

The remaining counts included three poisoning charges under Section 347(a)(1) and three attempted-poisoning charges under Sections 664(a) and 347(a)(1), tied to July 11, 18 and 25, 2022. Deputy District Attorney Tina Hanley presented the case, and foreperson Kathleen M. Conwell-Doyle signed the true bill.

Donahue identified three prosecutorial failures. Prosecutors withheld the opinion of an FBI chemist who concluded the three samples at issue were "drinkable" and not harmful based on their pH levels, evidence the court found negated a necessary element of the case.

They dismissed two grand jurors in front of the remaining panel in violation of state law, conduct the court said undermined the panel's independence. And they continued withholding exculpatory evidence after grand jurors specifically asked about Yu's defense.

After reviewing the grand jury transcripts, Donahue concluded the cumulative effect of the violations required dismissal of the case in its entirety. He found a reasonable probability that the grand jury would not have found probable cause to indict had it been properly informed.

The panel heard testimony from nine witnesses, including FBI Chemistry Unit chemist Jason Brewer, Irvine Police Department crime scene investigator Shannon Goldsmith, Detective John Sanders and physicians Patricia Tsai and Brian Riff.

Simmons, said the ruling vindicated both his client and the judicial process.

"Judge Donahue's ruling reflects the justice system at its best -- a court carefully reviewing the record and ensuring that the grand jury process worked the way it is supposed to," Simmons said. "For Dr. Yu, this has never been an abstract legal matter. She is a dedicated physician and a mother who has spent four years separated from her children, fighting allegations her legal team believes were orchestrated to gain leverage in a divorce and custody proceeding. The human toll of that cannot be overstated."

"We are proud to have stood by her through this, and we are grateful to Judge Donahue for his thorough and principled analysis. Dr. Yu has maintained her innocence from the beginning. Now she can begin to reclaim what matters most -- her family, her patients, and her life," he added.

Yu, who has maintained her innocence throughout the case, said the ruling allows her to move forward. She performs Mohs micrographic surgery on skin cancer patients and is widely regarded as one of Orange County's leading dermatologists. According to her legal team, the allegations surfaced in July 2022 during an acrimonious divorce from her physician husband, whom they contend orchestrated the accusations to gain an advantage in family court. The charges kept her separated from her children for years.

The District Attorney's Office said it remains confident in the evidence.

"We will continue to litigate this in a court of law as we pursue justice for an individual who was being methodically poisoned by his wife, a licensed medical professional whose intent was to inflict pain on him," said Kimberly Edds, an office spokesperson. "We believe in the strength of the evidence in this case, and in the professional conduct of our prosecutors."

Simmons responded that the controlling authority is Penal Code Section 1387, a critical safeguard against repeated prosecution.

"They can obviously refile, and we'll be happy to respond," Simmons said. "We'll bring a motion to dismiss again."

Prosecutors allege that in early April 2022, Yu's husband began noticing a strange taste in the tea he drank daily and secretly installed cameras in the family's Irvine kitchen when the taste persisted.

According to the allegations, video recorded on July 11, 18 and 25, 2022, showed Yu pouring a substance from a bottle of liquid drain cleaner into tea left on the counter. He collected samples and turned them over to the Irvine Police Department, which submitted them to the FBI. Testing confirmed the substance was consistent with liquid drain cleaner.