Trump shooting: What's next for the investigation?

People are returning to the site where now-dead gunman, Thomas Matthew Crooks, tried to assassinate former President Donald Trump. A Butler, Pennsylvania farm show will be the first public event there since July 13. It comes as investigators try to figure out what went wrong with security that day. FOX's Olivianna Calmes is in Butler, Pennsylvania where the shooting happened and has what's next in the investigation.