A toxicology report is helping doctors fill in some clues into what happened to wrestler Chris Benoit.
Doctors found testosterone in his body Tuesday, but can't say if it turned him into a murderer.
They do believe the pro wrestler drugged his young son before killing him.
Investigators said Benoit murdered his wife and seven-year-old son last month before hanging himself.
The state's chief medical examiner released toxicology reports Tuesday.
Nancy and Chris Benoit both had the painkiller hydrocodone and the anti-anxiety drug, Xanax, in their systems.
Neither showed levels that were out of the ordinary, but Benoit also tested positive for the testosterone and test results showed Xanax in Daniel's system as well.