Medical Examiner Reveals Cause of Death for Chandler Boy Trigg Kiser, 15 Months Later

More than a year after three-year-old Trigg Kiser drowned in his family's backyard pool in Chandler, a medical examiner's report has revealed his official cause of death for the first time: an anoxic brain injury due to drowning, with the manner of death ruled an accident. The boy, son of TikTok personality Emilie Kiser, was pulled from the family's pool on May 12, 2025, and died six days later on May 18, 2025.

The Maricopa County Medical Examiner's report was released on August 25, 2025, and obtained by Us Weekly, according to The Tab. The document confirms what investigators had already pieced together in the months following the tragedy: Trigg wandered outside alone and ended up in the water while his father, Brady Kiser, was inside the house.

What Happened the Day Trigg Drowned

According to the same report, Emilie Kiser was out to lunch with friends at the time, while Brady was home looking after the couple's newborn son, Teddy, then just five weeks old. Brady told investigators he noticed something was wrong after the family's dog looked outside toward the pool. Trigg was ultimately found unconscious after being pulled from the water and was rushed to Chandler Regional Hospital before being transferred to Phoenix Children's Hospital, where he was hospitalized in critical condition for almost a week before he died.

Home surveillance footage examined by investigators showed Trigg was unsupervised near the pool for nine minutes before he fell in, and the boy was in the water for seven minutes before he was discovered, per the report cited by The Tab. A 50-page investigation report released by the Chandler Police Department on August 11, 2025, laid out the same surveillance timeline, revealing that Brady's attention was divided between watching an NBA playoff game between the New York Knicks and Boston Celtics and caring for the newborn, according to FOX 10 Phoenix. That report also noted the father had initially told investigators he lost sight of his son for only a few minutes, a discrepancy the surveillance footage did not support.

Charges Recommended, Then Declined

Chandler Police formally recommended a Class 4 felony child abuse charge against Brady Kiser on July 15, 2025. Under Arizona Revised Statutes § 13-3623, child abuse resulting from criminal negligence carries potential prison sentences ranging from 1 to 3.75 years for first-time offenders, per the Shouse Law Group. But the Maricopa County Attorney's Office announced on July 25, 2025, that it would not prosecute, determining there was no reasonable likelihood of conviction under the state's criminal negligence standard.

The county attorney's office noted that a conviction would require proving a gross deviation from a reasonable standard of care, a higher bar than simple distraction, according to the Maricopa County Attorney's Office. Hoodline previously reported that the office declined to charge Brady Kiser in connection with his son's death, closing the criminal chapter of the case even as the medical findings remained unreleased at the time.

A Legal Fight Over Privacy

The case also became a flashpoint over public records. In May 2025, Emilie Kiser filed a lawsuit in Arizona Superior Court against Chandler police and local government agencies seeking to permanently block the release of 911 audio and investigative records, citing severe privacy concerns amid an intense wave of online attention. An Arizona judge granted an interim ban on the records' release before police reports were ultimately released with redactions, as reported by USA Herald.

Kiser, a Phoenix-area lifestyle content creator who had built a following of over 4 million TikTok users before the drowning, had frequently featured her family life in Chandler on her platforms, which amplified attention on the case well beyond typical local drowning coverage, per KTAR News. Hoodline first covered the community's reaction to the drowning in a report on the tragic loss shortly after it occurred. Paramedics performed CPR on scene after officers responded to the drowning call, and the family is now expecting a third child, according to The Tab.

State Law and the Fence That Wasn't There

On August 28, 2025, Emilie Kiser posted her first public statement since the drowning on TikTok, saying she took full accountability as a mother and emphasizing that installing a permanent pool fence could have saved her son's life, according to FOX 10 Phoenix's coverage of the video, which reached her millions of followers as a water-safety message.

Under Arizona Revised Statutes § 36-1681, any residential swimming pool deeper than 18 inches in a home with children under six years old must be fully enclosed by a barrier at least five feet tall with self-closing and self-latching gates, according to FindLaw. Municipal codes in Phoenix-area cities can enforce even stricter fencing rules on top of the state requirement.

A Statewide Problem

The Kiser case unfolded against a backdrop of persistent drowning risk across Arizona. The Arizona Department of Health Services' Child Fatality Review Program recorded 36 child drowning deaths statewide in 2024, determining that 100% of those fatalities were preventable, per findings reported by AZ Law Now. Drowning remains the leading cause of accidental death for Arizona children aged 1 to 4.

There are signs of progress regionally. Data compiled by Children's Safety Zone and cited by 12News showed water-related fatalities across Maricopa and Pinal counties dropped from 79 in 2024 to 57 in 2025, with fatal drownings involving children under age five declining from 18 to 8. Advocates noted that many child drownings occur during non-scheduled swimming times, when kids gain unmonitored access to backyard pools. In April 2026, the Phoenix Fire Department launched a regional water safety campaign offering $15 swim lessons and applications for free pool fences, aiming to remove financial barriers to prevention for families across the Valley.