just days after they left, this. a gruesome shark attack killed 20-year-old champion bodyboarder david lilienfeld. these pictures were taken just moments following his death. their father consoling his brother and then a friend comforting him. there hasn't been a shark attack in the area for several years. so now these researchers are being blamed for lilienfeld's violent death. because they used the practice of chumming, throwing large amounts of bait to lure these fierce predators closer. a frenzy of scathing attacks was ignited on the shark men's facebook page. one wrote, was it worth it? the life of a young surfer? another said, morons. stay in your own country. so are the makers of "shark men" responsible for lilienfeld's death? >> it's more a tragic accident. fisher group were not there at the time of the attack. they there were three days