article_snippet: a police report about Monday's incident was caught on surveillance cameras on the MetroLink train and a passenger recorded a police report about Monday's incident with a cell phone and posted the video online.
article_snippet: As the train pulled into a station, a security guard saw part of the beating and alerted police.
article_snippet: the train's surveillance cameras captured clear images of The train's surveillance cameras faces, which MetroLink passed on to journalists.
article_snippet: Police are looking for The train's surveillance cameras.