COPPELL (July 28, 2010)--Autopsy reports show that Coppell Mayor Jayne Peters, 55, was several feet behind her daughter Corinne when she shot and killed the 19-year-old.

Records released by the Dallas County Medical Examiner’s Office and Coppell police show that Peters shot herself in the forehead sometime after killing her daughter, Corinne Peters.

The records show the women didn't have alcohol or drugs in their systems when they died, but Jayne Peters did have two patches of the powerful painkiller fentanyl on her back.

The medical examiner's office found no evidence of the painkiller in her system.

It’s possible she died before her body absorbed the drug.

Corinne Peters was evidently unaware of her mother’s financial problems since the death of her father from cancer in 2008.

She told friends she was enrolled for the fall semester at the University of Texas and until the day she was shot to death was driving a car that she evidently thought was a graduation gift, although it turned out to have been a rental.

Jayne Peters was also facing a spending review, a Coppell city official said earlier.

Coppell City Manager Clay Phillips told the Dallas Morning News that he asked the city attorney to investigate Peters' use of her city-issued credit card after Peter ignored repeated requests for receipts from some questionable charges.

Coppell officials said Wednesday that Peters charged more than $6,300 in personal expenses on her city credit card, but they also announced that an anonymous donor gave the suburb $10,000 accompanied by a note that read, "Please use these dollars to reimburse the city for any and all credit card charges of Jayne Peters, with any remainder to go to the city."

Close to $2,000 of the charges were made two weeks before Peters shot herself and her daughter for such things as rental car fees, gas, restaurants, clothes and groceries.

Police found the bodies of Peters and her daughter after the usually punctual mayor failed to show up for a city council meeting.

Police say an envelope taped to the front door of the home contained a key and a typed note warning officers they would find something unpleasant inside the house.

Three other notes also were found, but police said they didn't offer an explanation for the deaths, only instructions for managing family affairs, such as care for the dogs.

Peters, who was a contract software developer, had been mayor of Coppell since last year, after a decade as a city council member.

Corinne Peters graduated from Coppell High School this spring.