ATLANTA – Pro wrestler Chris Benoit’s father said Friday that he was eager to see whether chemical tests can help explain why Benoit killed his wife and son and committed suicide, acts that the wrestler’s father said he had no clue were coming.

Michael Benoit said by phone from his home in Alberta, Canada, that his family is shocked and in disbelief over the slayings.

“We have no understanding of why it happened,” he said. “We need some time to gather our thoughts and wait and see. There’s still more information that’s going to come out from toxicology tests that will give us some understanding of why this happened.”

Anabolic steroids were found in Benoit’s home, leading officials to wonder whether the drugs played a role in the killings, which took place last weekend. Some experts believe steroids cause paranoia, depression and violent outbursts known as “roid rage.”

Chris Benoit strangled his wife and 7-year-old son, placing Bibles next to their bodies, before hanging himself on the cable of a weight-machine in his home, authorities said. No motive was offered for the killings.

Investigators had not discovered the bodies Monday when someone altered Benoit’s Wikipedia entry to mention his wife’s death, authorities said.

An anonymous user with the same IP address as the person who made the edits confessed early Friday on an online discussion page attached to the Web site, saying the changes were based on rumors and speculation, not hard evidence.

The authenticity of the posting could not immediately be confirmed.

“I just can’t believe what I wrote was actually the case, I’ve remained stunned and saddened over it,” the user wrote.

According to Wikinews, an online news source connected to Wikipedia, the Internet protocol address of the individual is identical to that of the user who edited Benoit’s profile early Monday morning. An IP address is a unique series of numbers carried by every machine connected to the Internet.

Benoit’s page on Wikipedia, a reference site that allows users to add and edit information, was updated at 12:01 a.m. Monday, about 14 hours before authorities say the bodies were found. The reason he missed a match Saturday night was “stemming from the death of his wife Nancy,” it said.

Wikipedia confirmed the authenticity of the time stamp and said the entry was made by someone using an IP address registered in Stamford, Conn., where World Wrestling Entertainment is based. The anonymous user acknowledged being from Stamford, but claimed no connection to WWE.

Wikipedia referred further questions to authorities investigating the deaths. Messages left for Fayette County District Attorney Scott Ballard were not immediately returned Friday.

WWE attorney Jerry McDevitt said that to his knowledge, no one at the WWE knew Nancy Benoit was dead before her body was found Monday afternoon. Text messages released by officials show that messages from Chris Benoit’s cell phone were being sent to co-workers a few hours after the Wikipedia posting.

On Thursday, federal agents said they had raided the west Georgia office of a doctor who prescribed testosterone to Benoit, said agent Chuvalo Truesdell, a spokesman for the Drug Enforcement Administration. No arrests were made during the raid at Dr. Phil Astin’s office late Wednesday into Thursday.

Hours before the raid, Astin told The Associated Press he had treated Benoit for low testosterone levels, which he said likely originated from steroid use.

Investigators were looking for Benoit’s medical records to see whether he had been prescribed steroids and, if so, whether that prescription was appropriate, according to a law enforcement official speaking on condition of anonymity because records in the case remain sealed.

Astin prescribed testosterone for Benoit, a longtime friend, in the past but would not say what, if any, medications he prescribed when Benoit visited his office June 22.

Michael Benoit, who lives near Edmonton in Ardrossan, said the test results, which could take several weeks to be completed, “could give us closure.” He said his son had seemed fine when they spoke on Father’s Day, and had even said he regretted having to work instead of spending the day with his family.

“That really wouldn’t give you an indication of someone who would do what he did a week later,” the father said.

Associated Press writers Jason Bronis in Atlanta and Matt Apuzzo in Washington contributed to this story.