The search warrant was obtained by the Fayette County Sheriff's Department in connection with the Benoit investigation, according to Chuvalo Truesdell, spokesman for the department.
Benoit had been under the care of Astin, a longtime friend, purportedly for treatment of low testosterone levels. Benoit visited Astin Friday, the day police say he killed his wife. The doctor said that Benoit showed no signs of distress at their meeting.
Anabolic steroids were found in Benoit's home, leading officials to wonder whether "roid rage" may have played any role in the murders. Results from toxicology tests may not be completed for two weeks.
Fayette County District Attorney Scott Ballard said that empty beer cans were found in a trash can in the Benoit home and an empty wine bottle was discovered a few feet from where Benoit hanged himself.
McDevitt, the WWE attorney, has said that Benoit and his wife had been arguing over whether the wrestler should take time off to help care for their son, Daniel, who suffers from a rare medical condition called Fragile X syndrome.
Benoit did request and receive four months off from work in 2006 for personal reasons. "He was feeling depressed, that kind of thing," McDevitt said.
On Friday, Benoit's father spoke publicly for the first time. Michael Benoit said he could not understand what might have motivated his son to murder his wife and son and kill himself, but he's hopeful the toxicology reports might finally provide some answers.
Information from The Associated Press was used in this report.