- Associated Press - Wednesday, February 12, 2014

PHOENIX (AP) - The cause of death remains in question for a Casa Grande surgeon whose body was found in her burned home along with her husband and their young son.

The Arizona Republic (https://bit.ly/1boq3Kl) reports autopsies found that 50-year-old Dennis Brough and 11-year-old Trevor Brough both died from smoke inhalation.

An autopsy found that Dr. Joyce Bonenberger had several skull fractures but no smoke inhalation.

Pathologists don’t know whether she got the fractures before or during the mid-December fire.

The autopsy on the 51-year-old Bonenberger also shows that she tested positive for opiates, morphine and codeine.

Pathologists found no soot in her lungs.

She was chief of surgery at Casa Grande Regional Medical Center.

The house collapsed as a result of the fire, which Pinal County Sheriff’s officials regard as suspicious.

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