Breaking: Video shows graphic police shooting at Dallas airport

A video posted to Instagram shows a man who appears to be a security guard or a police officer at Dallas Love Field Airport shooting a person near one of the airport's entrances "I came outside and a guy with dreads just had a rock in his hands walking toward police and the police just told him to put the rock down, stop walking He just wouldn't listen and kept walking toward them," Bryan Armstrong, the witness who shot the video, told CNN