Manhunt for Brown University shooter

The manhunt for the gunman who killed two Brown University students and injured seven more in a classroom shooting stretched into a fourth day on Tuesday, leaving the campus and surrounding neighborhood on edge.



Authorities, including the FBI, released a timeline video comprised of surveillance clips from neighborhood cameras and a car's dashcam tracking the movements of the suspected shooter on Saturday, in the hopes that someone might recognize him.



The clips, stitched together, show a man dressed in dark clothes and wearing a mask walking briskly, and at one point running, between 2 p.m. and 3 p.m. along several different streets, about a block away from the building where the attack would later take place.



The shooting occurred at 4:03 p.m., and another clip showed the same person from a distance walking from the building's parking lot toward the street, even as police cars with flashing emergency lights pull up to the scene.



The final clip shows the man walking along that street about three minutes after the shooting.