Former Los Angeles County Sheriff Alex Villanueva has been dropped as a defendant in a lawsuit accusing sheriff's department members of fabricating a memo to cover up the 2020 heat-related death of bomb-sniffing K-9 Spike, just 17 days before the case is scheduled for trial. Veterinarian Dr. Yolanda Cassidy, who filed the suit, claims the department falsely attributed medical opinions to her that she never gave, and now seeks roughly $15 million in damages tied to the fallout.
Spike, a 6-year-old black Labrador assigned to the department's Arson Explosives Detail, died after being left in an overheated department-owned 2013 Chevy Tahoe on October 29, 2020, according to WitnessLA. Sgt. Daniel Tobin was his handler, and his death would not become publicly known for another two years. Cassidy's attorneys filed papers on September 21 asking Judge Alison Mackenzie to remove Villanueva from the case, according to MyNewsLA.com, though the filing did not state a reason for the request.
The disputed LASD memo attributed Spike's death to an underlying medical condition or choking on vomit. It also claimed Dr. Cassidy had examined Spike and could not determine his cause of death, a characterization the lawsuit says is entirely false, stating she never treated or saw the dog and offered no opinions about how he died.
A Two-Year Gap Before the Cover-Up Story Surfaced
Spike's death did not become public until late 2022. Cassidy alleges Villanueva and a sheriff's department chief used fraud to conceal the dog's death, as reported by Business Insider. The suit claims that a rival, Sheriff Robert Luna, said Villanueva was so corrupt that he covered it up.
Cassidy specializes in what's known as tactical K-9 casualty care — treating police working dogs in emergency field situations — and was a go-to veterinarian for many LASD K-9 handlers before the memo's publication damaged her practice, per the same Business Insider account. The lawsuit, filed in July 2023, raises claims of false light, invasion of privacy, and misappropriation of likeness. Cassidy says she suffers major depressive disorder tied to emotional distress from the alleged false accusations, and claims financial losses of about $15 million.
County Fought to Toss the Case, Judge Refused
Los Angeles County attorneys had sought to dismiss the case, contending the memo contained no provably false or defamatory statement and did not attribute wrongdoing, negligence, or professional misconduct to Cassidy. The county argued the memo stated indisputably true facts about an October 2020 meeting and reflected protected opinion about Spike's possible cause of death, adding there was no evidence any defendant knew the statements were false or acted with reckless disregard for the truth. Judge Mackenzie denied that motion in December 2025, allowing the case to proceed toward trial.
County attorneys have also pointed out that Cassidy opened her own veterinary practice after the memo was published and continues to serve law enforcement clients, though the suit counters that she was on the verge of launching her own veterinary clinic in 2022 and was, up to that point, described as highly successful and well-respected with a stellar reputation. Trial in Cassidy's case is scheduled for October 8.
Villanueva's Exit Fits a Broader Pattern
Villanueva's removal from this case echoes a similar outcome in March, when Los Angeles Superior Court Judge Randolph M. Hammock dropped Villanueva with prejudice from a separate civil rights suit brought by a department employee, leaving Los Angeles County as the sole remaining defendant in that matter. Villanueva is running to reclaim his old job as sheriff in the 2026 election against incumbent Robert Luna, according to FOX 11 Los Angeles. It remains unclear whether court testimony in Cassidy's case will identify who actually authored the backdated memo.
Spike's Death Reflects a Persistent National Problem
Spike's case is far from an isolated incident nationally. An academic study of line-of-duty K-9 deaths between 2000 and 2023, published via Taylor & Francis, found that heatstroke is the second-leading cause of death for U.S. police dogs after gunfire, with 70.6% of heatstroke deaths characterized by unattended conditions or mechanical failures. Locally, a Long Beach Police Department K-9 named Ozzy died inside a patrol vehicle in August 2019.
