False claims, conspiracy theories and posts naming people with no connection to the incident spread rapidly across social media in the aftermath of conservative activist Charlie Kirk's killing on Wednesday, some amplified and fueled by AI tools.

CBS News identified 10 posts by Grok, X's AI chatbot, that misidentified the suspect before his identity, now known to be southern Utah resident Tyler Robinson, was released. Grok eventually generated a response saying it had incorrectly identified the suspect, but by then, posts featuring the wrong person's face and name were already circulating across X.

The chatbot also generated altered "enhancements" of photos released by the FBI. One such photo was reposted by the Washington County Sheriff's Office in Utah, which later posted an update saying, "this appears to be an AI enhanced photo" that distorted the clothing and facial features.

One AI-enhanced image portrayed a man appearing much older than Robinson, who is 22. An AI-generated video that smoothed out the suspect's features and jumbled his shirt design was posted by an X user with more than 2 million followers and was reposted thousands of times.

On Friday morning, after Utah Gov. Spencer Cox announced that the suspect in custody was Robinson, Grok's replies to X users' inquiries about him were contradictory. One Grok post said Robinson was a registered Republican, while others reported he was a nonpartisan voter. Voter registration records indicate Robinson is not...

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