not going to kill him because he was not an american. >> some of the suspects' movements during the carjacking are caught on camera. suspect number two is seen here on this atm's security cam. >> they did take the victim's atm card and went to an atm machine and withdrew $800. >> suspect number two is later seen on a security camera at this shell gas station. it's here that the carjacking victim escapes unhurt, but he leaves one thing behind. >> we got notified that the victim's cell phone was left in the carjacking vehicle. so the cambridge police were actually able to ping the phone and kind of pick up where its location was. >> it leads them to watertown, massachusetts. just after midnight, police intercept the suspects who the world will soon learn are brothers. a gun battle erupts in the middle of a residential street. more police officers and fbi rush to the scene. people watching from their homes