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AUSTIN — Investigators are trying to determine what caused the death of a 14-month-old girl after she had a dental procedure in Austin.

Autopsy results were pending on Daisy Lynn Torres. The Travis County Medical Examiner’s Office says Daisy was declared dead Tuesday at an Austin hospital.

The procedure took place earlier Tuesday at Austin Children’s Dentistry. Clinic spokeswoman Sarah Marshall says it’s a tragedy and all thoughts and prayers are with the family.

Details weren’t immediately released on what procedure was done on the girl.

The Texas State Board of Dental Examiners has opened an investigation into the death.

The heartbroken parents, Betty Squier and Elizandro Torres, told CBS Affiliate KEYE they want answers — and to make sure the same thing doesn’t happen to another child.

“She was a sweet baby; everyone loved her,” said Squier.

“She was so full of life. She had the most beautiful, raspy little voice,” said Torres, breaking down in tears.

Squier says her dentist first told her Daisy needed two fillings. The little girl had no previous medical conditions. When it came to anesthesia, Squier said she was scared and asked a lot of questions.

“They told me it’s something they do all of the time,” she said. “It’s no big deal.”

Five minutes later she received a call: “[The dentist] said the baby had gone into cardiac arrest and her heart stopped beating and the anesthesiologist had to perform CPR,” she said.

Paramedics took Daisy to the hospital, where she died hours later. The cause of death is still being determined, pending an autopsy.

Now, the family is demanding a thorough investigation and says if someone made a mistake, they want them held accountable.