Story highlights Brian and Courtney Halye died of cocaine and carfentanil intoxication, report says

Experts say Montgomery County is struggling with an opioid epidemic

(CNN) A toxicology report confirmed a drug overdose as the cause of death for a Spirit Airlines pilot and his wife, who were found dead in their southwest Ohio home on March 16.

Brian J. Halye, 36, and 34-year-old Courtney A. Halye died as a result of "cocaine and carfentanil intoxication," said Dr. Kent Harshbarger, the Montgomery County coroner, in a report released Tuesday.

The painkiller carfentanil, a version of fentanyl, is 10,000 times stronger than morphine. It is used commercially to sedate large animals, such as elephants, and drug dealers use it to cut heroin and increase their supply.

The toxicology report notes that husband and wife suffered pulmonary edema, "which is fluid in the lungs, basically, a classic characteristic of an opiate intoxication," Harshbarger said.

According to Officer John Davis of the Centerville Police Department, the Halyes left behind a "blended family": two 11-year-old girls, a 10-year-old girl and a 13-year-old boy. The children are now with other family members.