Chris Ryves set up Find Boston Bombers thread after the 2013 bombings . Within hours , millions of users had taken to subreddit to identify bomber . They analysed photos and videos of spectators at marathon on April 15 . Slung false accusations at those wearing backpacks or acting strangely . Claims led to Sunil Tripathi , 22 , being wrongly identified as the suspect . Frenzy only halted after Rhode Island and Tamerlan Tsarnaev were named . Now , Ryves has told of regrets about Reddit thread in new documentary . In film , The Thread , he says the subreddit 'became almost its own beast '
Chris Ryves set up Find Boston Bombers thread after the 2013 bombings . Within hours , millions of users had taken to subreddit to identify bomber . They analysed photos and videos of spectators at marathon on April 15 . Slung false accusations at those wearing backpacks or acting strangely . Claims led to Sunil Tripathi , 22 , being wrongly identified as the suspect . Frenzy only halted after Dzhokhar and Tamerlan Tsarnaev were named . Now , Ryves has told of regrets about Reddit thread in new documentary . In film , The Thread , he says the subreddit 'became almost its own beast '