A 9-year-old girl died hours after going under anesthesia for a dental procedure at a San Diego office where a dentist was previously investigated after a patient nearly died.

The procedure took place on March 18 at Dreamtime Dentistry in Vista. In a statement to NBC San Diego, Dr. Ryan Watkins said the child was “continuously monitored by our dentist anesthesiologist” and showed no signs of complications.

The statement said the child was “discharged in stable condition,” adding that she was awake and had stable vital signs when she was released into her mother’s care.

The medical examiner’s summary report, however, says that the child was taken to a recovery room after the procedure but was asleep when she was discharged.

“Based on preliminary information … the decedent underwent dental surgery under anesthesia in Vista and transitioned to a recovery room afterwards. She was later discharged from the facility and remained asleep during her transport home,” the report says. “Upon arrival, she stayed sleeping and was transitioned into her bed at home.”

Family members checked on the girl throughout the day. After finding her unresponsive in bed, they called 911, according to the report.

The girl was transported to the hospital, where she was pronounced dead. The cause and manner of death are pending.

Watkins said the office was “deeply saddened” by the girl’s death. In his statement, he said the girl was referred “for dental treatment under general anesthesia due to her young age and acute situational anxiety.”

“At this time, the cause of death has not been determined. The medical examiner is conducting a thorough investigation, with which we are fully cooperating. We are committed to ensuring all facts come to light,” the statement said. “The safety and well-being of our patients have always been and remain our highest priority. While we understand the concerns and questions surrounding this tragic event, we respectfully ask for patience as the investigation proceeds. For the sake of the family and the integrity of the process, we encourage restraint regarding speculation.”

Watkins is the only dentist listed on the office’s website as a trained anesthesiologist.

The San Diego Police Department is investigating the death. 

The Dental Board of California previously investigated Watkins after a patient nearly died in 2016, according to NBC San Diego. State investigators said the 54-year-old patient, who was put under anesthesia, was given two drugs, which led to the man’s heart-stopping.

Investigators said one of the drugs should have never been given to the man. Dr. Ryan Watkins was put on probation from 2020 to 2023, a decision order states.

NBC San Diego reported that the man ended up filing a civil lawsuit against Watkins, which was later settled.