Texas dentist accused of fatal mistakes after 4-year-old dies during dental procedure

A Texas dentist is facing criminal charges after authorities said a 4-year-old girl died from a toxic opioid dose following what should have been a standard dental procedure, with investigators alleging warning signs of the child’s distress were not identified in time.

Dr. Chrishelle Hemphill, 48, was taken into custody Wednesday on a charge of recklessly causing serious bodily injury to a child, a second-degree felony. Investigators say her conduct during an April 1 dental appointment led to the death of 4-year-old Aithana Rodríguez-Arriaga.

Fort Worth police said the arrest followed months of investigative work, including witness interviews and reviews by medical professionals and state dental authorities.

Booking photo of Fort Worth dentist Chrishelle Hemphill following her arrest on a child injury charge

Chrishelle Hemphill was arrested and charged with recklessly causing serious bodily injury to a child after the death of a 4-year-old patient. (Fort Worth Police Department)

Jail records reviewed by INC News show Hemphill was booked Wednesday afternoon and later released after posting a $10,000 surety bond.

According to the Fort Worth Police Department, firefighters were called to Cuddle Kids Dental after employees reported that the young patient had become unresponsive after the procedure. She was transported to a nearby hospital, where doctors pronounced her dead.

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“The Crimes Against Children Unit (CACU) began an investigation into this case,” police said in a statement provided to INC News. “Upon their findings, it was determined by the investigators that an offense had occurred and that the doctor that was performing the procedure on the victim was responsible.”

According to an arrest warrant affidavit obtained by INC News, Aithana’s mother told investigators she felt rushed into signing paperwork before the procedure and watched as Hemphill handed her daughter a cup containing liquid medication, encouraging her to drink it before she was taken into the treatment room. 

Aithana’s mother said she was not allowed to remain with her daughter during the procedure.

About an hour later, she was brought back into the room and found her daughter unresponsive while Hemphill attempted to wake her with a popsicle, according to investigators. Emergency crews were then called.

The tragic case has since prompted police to encourage parents to advocate for their children during medical procedures.

“The last thing you would expect as a parent,” Fort Worth Police Department spokesperson Brad Perez told affiliate FOX 4 Dallas.

Family remembers 4-year-old Aithana Rodríguez-Arriaga

A smiling Aithana Rodríguez-Arriaga holds purple flowers toward the camera in a family photograph. (GoFundMe)

“The one thing I would suggest is, if you feel like you want to be there when your child is having a procedure, insist on that,” Perez told the outlet. “I believe this mother wanted to check on the child but was unable to do so as the procedure occurred. Perhaps the mother could have seen signs that the doctor did not at the time.”

The Tarrant County Medical Examiner later ruled Aithana’s death an accident caused by meperidine toxicity, according to records obtained by INC News.

The arrest affidavit alleges the 4-year-old had 793 ng/mL of meperidine in her system — a level investigators say medical experts believed would have been toxic even for an adult.

As detectives dug deeper into the case, they consulted with the Texas State Board of Dental Examiners, reviewed the board’s investigation and sought opinions from outside medical specialists.

Aithana Rodríguez-Arriaga remembered after fatal dental procedure

School portrait of 4-year-old Aithana Rodríguez-Arriaga, who died after a dental procedure in Fort Worth. (GoFundMe)

According to the affidavit, Aithana received chloral hydrate, hydroxyzine and meperidine in addition to nitrous oxide gas. While each medication individually fell within recommended limits, investigators allege Hemphill failed to account for the powerful combined effect of the drugs.

Police also allege Hemphill failed to recognize signs that Aithana was slipping into respiratory distress and administered flumazenil, which reverses benzodiazepines, instead of naloxone (Narcan), the medication used to counter opioid overdoses. 

The affidavit notes no benzodiazepines were found in the girl’s system.

A person monitors the dental robot with a monitor.

MIR remains a prototype, with researchers planning to add sensors and a camera before testing it in real dental settings. (University of Basel, Catherine Weyer)

Investigators also cited findings from a board-certified anesthesiologist, who concluded Aithana was not properly monitored during the critical recovery period after sedation and that the emergency response failed to address opioid-induced respiratory depression.

Perez told FOX 4 that Hemphill had no prior disciplinary actions and that her dental license remained active with the Texas State Board of Dental Examiners at the time of her arrest.

The investigation uncovered additional concerns inside the dental office. According to court documents, investigators found syringes containing leftover medication that staff allegedly intended to save for future patients, as well as confusion over where Narcan was kept during the emergency.

Cuddle Kids Dental office in Fort Worth, Texas

Exterior of Cuddle Kids Dental in Fort Worth, Texas, where a 4-year-old girl died after a dental procedure. (Google Maps)

“Throughout this investigation I have learned from Hemphill’s own statements, her staff’s statements and from medical professionals, that there was evident neglect on Hemphill’s part that led to Aithana’s death,” a detective wrote in the arrest affidavit.

For Aithana’s family, the arrest comes more than three months after they lost what a GoFundMe describes as a “beautiful 4-year-old girl, filled with life and kindness” whose presence “always lit up a room.”

“She was sweet, loving, and touched the lives of all who knew her,” the fundraiser says.

It adds that donations will help cover funeral expenses, support her grieving parents and bring Aithana home to Mexico for burial. 

She is survived by her parents, an older sister and a younger sister.

The Tarrant County District Attorney’s Office confirmed to INC News that Fort Worth police submitted the case Wednesday and that prosecutors are currently reviewing it.

INC News has reached out to Hemphill’s attorney and the Texas State Board of Dental Examiners for comment.

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