ben brody was not there, but online trolls tried to guess who was involved. they found random photos of ben online. >> they said, oh, this person looks like him, he has to be this person, you know, there's no way it's not him. it was just, like, an assumption that went wrong. >> reporter: the person in the video resembled ben, and even though it was not him, they blamed him. they pulled information from his fraternity page and turned it into a lie that he was a federal agent that was infiltrating the group. a so-called false flag operation. >> hey, what's up, guys, my name is ben brody, and i wanted to address the false accusations against me. >> reporter: desperate to clear his name, ben made this video. he even posted timestamped surveillance footage showing him at a store in california at the same time the brawl was happening near portland. but the false claims about ben's involvement continued to spread. even the owner of twitter, now x, elon musk, weighed in, posting to his millions of followers, "looks like one is a college student who wants to join the