>> reporter: that's right, jim. that's one of the two really big questions right now that they're looking into, is where is this gunman? who is this gunman? also, was this a terrorist attack or was this criminal? and really this investigation hinges on determining if it was a terrorist attack or criminal, the police will then go about their investigation in different directions. but they're looking at this amateur video of the cctv video of what happens. you can see before the attack took place, there is a -- the gunman is in a supermarket looking at produce. he gathers some, puts it back. goes on and off screen. then eventually puts his bag down on some shopping carts at the entrance. he pulls out the gun. he starts shooting everyone in this pub on the sidewalk, takes off running but he leaves that bag behind. that's going to be helpful for authorities as they investigate it. trying to get any clues off this bag to determine what the