>> threats. threats. and that is why they were given instructions to go ahead and shoot at them. >> reporter: the sheriff tells cnn that eyewitnesss have come forward to him, witnesses he says who claim to know what happened here that day. they describe a military style attack. three boats, several shooters, and hundreds of rounds being fired at two jet skiers. >> the shot that killed david hartley was an unluckily shot. >> you don't believe that the hartleys are drug dealers? >> no. >> you don't believe that tiffany may have executed her husband? >> i don't think so. >> a surveillance photo taken that very afternoon, one hour after the attack. >> you notice in front of the boat, you see bundles of marijuana there. >> it shows a small boat and a group of men, one with a green