DECATUR, Ga. -- Georgia's top medical examiner says pro wrestler Chris Benoit had the steroid testosterone and other drugs in his system when he killed his wife and son and then took his own life.

Dr. Kris Sperry also said the seven-year-old, Daniel Benoit, was sedated when he was killed, and that the mother also had prescription drugs in her system.

He said a test on Chris Benoit's urine showed elevated levels of testosterone.

VIDEO: Steroids Found In Benoit's Body

"This level of testosterone indicates that he had been using testosterone at least within some reasonably short period of time prior to the time that he died, depending on how it was injected, the form that it was used," said Sperry.

But Sperry said the results do not show whether steroids were linked to the killings last month at the Benoits' suburban Atlanta home.

Also found in Chris Benoit were the drugs Xanax and hydrocodone, according to a statement from the Georgia Bureau of Investigation. The GBI said Benoit was negative for blood alcohol.

The statement said Nancy Benoit had the anti-anxiety drug Xanax, and the painkillers hydrocodone and hydromporphone in her body.

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

The statement was released just before an afternoon news conference.

Authorities say Benoit killed his wife and son last month, then hanged himself on the cable of a weight machine.