The former mixed martial arts superstar and professional wrestler Ronda Rousey apologized on Friday for reposting a video in 2013 that spread conspiracy theories about the Sandy Hook Elementary School mass shooting, calling it “the single most regrettable decision of my life.”
Ms. Rousey, who was one of the Ultimate Fighting Championship’s biggest stars, explained in her apology that she “watched a Sandy Hook conspiracy video and reposted it on twitter.”
Ms. Rousey said the news media never asked her about the post, which has since been deleted. She said she considered apologizing for it many times, including in her memoir, but worried that doing so might “lead more people down the black hole” of conspiracies.
“I deserve to be hated, labeled, detested, resented and worse for it,” she said in her apology, adding, “I apologize that this came 11 years too late.”
Ms. Rousey’s apology came days after she hosted a Q. and A. session on Reddit.
A user asked her if she should apologize for “sharing a video that you called ‘must-watch’ and ‘interesting’ that had claimed the Sandy Hook School Massacre was part of a government conspiracy.” Other users also asked about her old post.
On Dec. 14, 2012, a 20-year-old man armed with semiautomatic pistols and a semiautomatic rifle walked into the school in Newtown, Conn., and killed 26 people, 20 of them children.
In the years since, false conspiracy theories about the event have proliferated on the internet.
In 2018, relatives of Sandy Hook victims sued Alex Jones, a media personality who spread conspiracy theories about the shooting through his company Infowars, for defamation. They were awarded more than $1.4 billion in damages, though what the families might receive is unclear as further legal battles drag on.
In a post dated Jan. 15, 2013, Ms. Rousey wrote, “asking questions and doing research is more patriotic than blindly accepting what you’re told,” apparently in response to backlash she received about the video she had shared, according to a 2013 article on Bleacher Report, a sports news website.
A 2013 analysis in The Huffington Post said the video, which appears to have been removed from YouTube, made a variety of false claims, including that some of the people in the school were paid actors.
A lawyer and agents representing Ms. Rousey did not immediately respond to requests for comment on Saturday.
Her apology has been viewed more than seven million times, and has received more than 2,000 comments, many of which appear to be supportive.
In 2018, Ms. Rousey became the first woman to be inducted into the U.F.C. Hall of Fame. She also won a bronze medal at the 2008 Olympics in middleweight judo and for years was one of the biggest stars for WWE.