>> we literally would walk through wooded areas chaperoned and we would walk for a period of time until about an hour before nightfall. >> but now a new twist in the murders. patrick baltazar, the 20th victim, would be the last child to turn up in a wooded area. a day or two later an official would tell reporters fibers and dog hairs were being collected from the victim's clothing. the next child to die would be found in a river wearing nothing but underpants. fewer clues now for larry peterson. >> we're talking maybe a dozen or dozens of fibers as opposed to hundreds or potentially a thousand fibers. >> the 13-year-old victim was found beneath this bridge over the south river in atlanta's suburbs. a driver crossing that bridge earlier in the week saw a man