because of ms and a painful condition known as fibromyalgia. she often took pain medicine to manage her symptoms. >> she was, to put it bluntly, a heck of a woman, as far as her fighting spirit and everything is concerned. >> her parents were concerned by the crowd she sometimes ran with. she was with some guys you weren't fond of? >> that's right. >> even so, her parents couldn't have imagined who would have shot her or little erica or why. and that just ramped up their own fears that the shooter or shooters might come back. >> i was scared to death. i thought, my god, what if they don't catch these people? >> at the crime scene, detective arnold was searching for answers, combing the house for more clues. >> closet that contains a safe. >> some contents apparently missing. >> the first thing that popped in my head was some type of robbery.