even attempt this. ♪ narrator: after her miraculous escape from a rapist who left her for dead, wendy gaunttnable to speak because of a nearly fatal knife wound to her neck. wendy was one of the most self-possessed people you can imagine in such a situation. she knew exactly what had happened to her. she knew exactly what she needed to do. narrator: and that was to identify the man who tried to kill her. forensic artist karen taylor was brought in to see if she could come up with a composite sketch of wendy's attacker -- a difficult task under any circumstances, but particularly difficult in this one. taylor: she could nod yes or no, and i would ask always open-ended questions to avoid leading her in any way. i would ask things like, "was he a certain type? did he strike you as sort of a jock, or was he a cowboy kind of a guy, or more of a rocker kind of a guy? was there a certain type?" narrator: to jog wendy's memory, karen taylor showed her an fbi manual of facial types. taylor: i began to introduce the reference feature pictures so she could further refine each feature for me -- the eyes

kids or any other kids like tha narrator: investigators are convinced that the sketch created by wendy gauntt and karen taylor, the one that finally alerted detectives to daniel corwin, saved an untold number of lives. ♪ hidalgo: daniel corwin picked the wrong woman to attack that day. he still would have kept killing. there's no doubt in my mind that that would have -- there would've been more people out there dead. taylor: wendy put a face on him. there was a lot of investigative work done on all these cases, but make no mistake, it was wendy who brought down daniel lee corwin. she connected the dots. it was her strength that put it all together. burrough: not a lot of people like that. she actually said to me, "i've had a great life, and the way i look on this is, i've had a great life for 38 years and one bad day." ♪ ♪ narrator: up next -- a late-night walk in an upscale neighborhood results in murder. the victim suffered a horrible, agonizing, painful death. narrator: surprise evidence sends investigators in an unexpected direction. murder has no boundaries. we're going wherever we got t