DECATUR, Ga. – Investigators said Tuesday they found steroids and other drugs in the body of pro wrestler Chris Benoit, who killed his wife and young son last month before hanging himself in the family’s home.

Besides steroids, Benoit’s body contained the anti-anxiety drug Xanax and the painkiller hydrocodone, according to a statement from the Georgia Bureau of Investigation. The GBI said Benoit tested negative for blood alcohol.

Benoit’s wife, Nancy, tested positive for Xanax, hydrocodone and the painkiller hydromorphone.

The son, Daniel Benoit had Xanax in his system, the agency said. The GBI said it could not perform tests for steroids or human growth hormones on the son because of a lack of urine.

The test results were expected to shed more light on Benoit’s last moments. Authorities said Benoit killed his wife and 7-year-old son in their suburban Atlanta home, placed Bibles next to their bodies and then hanged himself on the cable of a weight machine.

Anabolic steroids were found in the home, leading officials to wonder if the drugs played a role in the killings. Some experts believe steroids can cause paranoia, depression and violent outbursts known as “roid rage.”

Federal authorities have charged Benoit’s personal physician, Dr. Phil Astin, with improperly prescribing painkillers and other drugs to two patients other than Benoit. He has pleaded not guilty.

Investigators have also raided Astin’s office several times since the deaths, seizing prescription records and other documents.

Before he was charged, Astin told the AP he prescribed testosterone for Benoit, a longtime friend, in the past. He would not say what, if any, medications he prescribed when Benoit visited his office June 22, the day authorities believe Benoit killed his wife.