>> the inimplications was for $131 we can retrieve that data. now everybody has to change their protocol on how they safe guard classified information. at times a perpetrators dna is the only clue at a murd her seen. what happens when you don't have a suspect to care it to? this case made forensic history when scientists see the killer's physical description. in the 1600s. baton rouge louisiana got its name from french settlers meaning red stick and referred

to. to this day baton vuj one of the most diverse cities in the country. pam operated an antique store. >> pam loved the life. everyday she couldn't wait to do all the things that she wanted to do. >> she was fun and skub rant, skuber rant. she was intelligent. >> shortly before a midnight in july, pam' husband called police to report his wife missing. >> he said when he got home the front door was wide open. his wife's keys were there but pam was gone. strangely, the pabath, there wa

blood that had been been there before. forensic testing revealed the blood on the carpet was pams. the couple's son was sleeping over at a friend's house and couldn't shed light on what happened. investigators had to consider whether pam had simply run off. her mother considered to even assume that possibility. >> our next thought is she might have had a boyfriend. i said if she had a boy fribd. i would have known. pam never looked at another man. byron was her sweet heart. >> family family offered a 75

authored roo ward for information on her whereabouts. for four days the search continues. pam's body was discovered 60 miles from home. >> it's amazing it was found. she had just been dumped at risky boy. the coroner's office took her into custody. the medical examiner explained pam had been stabbed to death and she had also been sexually assaulted. pam was a beautiful young woman. she had a lot of admirerers. i thought maybe had a crush on her and took her off. i guess we wanted hope. >> i never dreamed that she was murdered. no, you will not hear any more

memories. aum the happy times are gone forever. that's what it is like to lose your child. the medical examiner turned that pam had been killed on the night she disappeared. pam's house byron had an alibi and it was confirmed by others. police got a tip from a potential eyewitness. he thought he saw pam slumped forward in a white pick up truck about a mie from when she went missingitious this is a very desolate it really needs to anywhere where her body was found. >> the witness describings the driver as a young white male. >> police began to look for a white male in a white truck.

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>> at pam's autopsy, pathologist found biological evidence that she had been sexually assaulted and also contained the dna profile of her killer. >> we'd already taken his dna profile and put it into the fbi's national data base of offender as well as evidence from other cases. we knew at that point that she had not been linked to any other crimes. >> but this dna evidence did tell police something important. the same man who killed sam killed two other women several months earlier. >> i'd never had experience with a serial killer other than tv

shows. all of a sudden this was something that baton rouge hadn't dealt with before. >> two months early, she was stabbed 80 one times. her throat was cut. she was missing part of her ear. it was very violent horrible attack. >> all the people. all the women in the world, he picked murray. i'd give anything to know why. i don't know if you can know why because he wonder if he could articulate why if he knows why himself. >> like pam's case, there were no signs of forced entry. >> this person was absolutely vicious. >> also in that same neighborhood, gina green, a nurse was sexually assaulted and

murdered in her home. in all three cases the common thread was the telephone. either the killer took the victim's telephone or used the cord to train his victim. this led to speculation the killer asked his victims for assistance. everything he touched it took him. those were his trophies. >> when residentthey learned a was on the p loose they took every procaution. at night the streets were empty. it wasn't enough. several months later, the killer struck again. 23-year-old denae colam never

returned home. she was sexually assaulted and beaten to death. a witness reported sighing a white male in a white pick up truck near the cemetery juxt like pam's case. and the killer wasn't through. the body. 26-year-old carry was found near the whiskey bay bridge, not far from where pam's body was discovered. dna tests confirmed the same man sexually and presumably killed all five women. >> i think he was doing a lot of surveillance work. he was stopping his victims. he knew his move pts. he will be tough to catch. >> desperate for a league,

police called washington and asked for a criminal analysis of the crimes. >> we thought this was someone who watched and followed women from afar. when he interacted with women it would be shortly after that interaction before they felt uncomfortable. >> the fbi predicted the killer woos anti-social and learned a pea low average income. >> the fbi came in and said we are looking for somebody in the sing single, white. i know that there's been some confusion about that. i know what he was written and in the paper. it simply wasn't there. >> nevertheless, the local police obtained dna samples from over 1,000 men, most of them

white between the ages of 20 and 40. most of them ahad a history of criminal activity. not one of them was a match. >> that's where mol anning lar biologist came in with a warning that eyewitnesss and behavioral profiles are not always right. >> that time of information is faulty wrong. sometimes people lie or they are mistaken. >> so the doctor made an offer saying he would perform a brand new dna test and promise he could identify the killer's physical characteristics. >> to be honest, i really didn't believe. he purported that he could determine the race of folks from dna. i said there's no way in the world i can do that. >> this type of dna ascertains

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based on statements from two eyewitnesss baton rouge police were searching for a white male driving a white pick up truck in connection with five unsolved murders. with little to lose, investigators joined forces with a molecular biologist to per form a new test on the killer's dna. >> it's brand new technology. a lot of these people are unaware of what it can to. we have to go into the human genome and screen through large numbers of people in order to find these positions of dna so we can harness their power and use them for the purposes that

we are using them. >> to test the doctor's claims. investigators sent him 20 dna samples and asked them to identify the race of each one. >> he nailed them to a t on everybody even to the percentages of white, black, indian, whatever you had in it. when he passed that test he went to work on the killer's dna. the results, the dna test showed the killer was not a caucasian. the crime seen dna sample correspondented to an individual who was 85% sub-saharan african and 15% native-american. >> at first police couldn't believe it. >> the remember the phone line going silent for a few minutes. >> it kind of threw you off because traditionally ai serial killer is usually a white male.

>> police now realized the so called eyewitnesss were wrong and they realized something else. around the same time of pam's murder about 60 miles outside the baton rouge, someone knocked on the front door of a woman named diane alexander and asked to use the phone. the man rip the phone cord from the wall and tried to strangle her. as she fought for her life her son came home unexpectedly, the attacker ran ahome still carrying the telephone cord. the cord was actually still sticking out of his vehicle. >> police remember finding similar telephone court near kim's body. was it possible that the killer took diane alexander's telephone

cord with him when he killed pam? to find out forensic experts compared the cord by per performing a fracture mat comparison. although plastic stretches when pulled, the ends usually remain intacted. they actually took the remaining cord from diane alexander's house and matched it to the court found at ann's dump site. >> he had previous arrests for burglary, stocking and peeking into their homes. if lee was the baton rouge serial killer, diane was fortunate to be alive.

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derek todd lee, a manual laborer, married with two children was identified by diane alexander in a police line-up was the man who assaulted her in her home but he denied he was the baton pruj serial killer.

lee's dna sample was sent immediately for testing, it matched the biological samples from all five victims. a sense of joy came over me and i had a smile and i says, we got him. >> derek todd lee was arrested and charged with first degree murder. >> the first thing i would tell him is that he's a coward. he picked on women that took advantage of their good nature. >> after his arrest investigators learned that his dna matched another murder victim, an lsu 21 year old. prosecutors say he followed his victims so he knew when they

would be home alone. he would knock on the door and ask to use their phone and then overpower them. fortunately for investigators, he left crucial dna evidence behind. at lee's trial the soul survivor identified lee as the man who tried to kill her. dna from perspiration found on ms. alexander's back matched his dna profile. forensic proof he was the perpetrator. >> this is the real deal that now this lady has come to you and pointed you out. it was devastating. >> derek todd lee was convicted of first degree murder and was sentenced to death. >> the death penalty is too good for him. they should execute him a little bit at a time.

rape was not enough. murder was not enough. the coroner called these murders, he heed are overkill. some of the victim's families are angry that police relied to heavily on the i writness accounts of a white male in a pick up truck and the fact that most serial killers tend to be right. >> the profile was wrong but -- it was given the force on fact and what it is is an educated guess. >> i think they were getting tons of tips. thousands of tips. i think they did the best they could and they worked very hard. >> in this case, dr. tony gredockus made scientistic history. it was the first time in bio geographic testing was ever used

in a criminal case. the technology now has a 99% accuracy rest. new tests can predict i color with 92% accuracy. >> if it tells you the name and address and phone number, it's time for me to leave this place. dna is too good then. >> this new test also shows the limitations of behavioral pro e profiles and the falability so so called eyewitnesss. >> i don't think it's too far out there to say that in the future there probably will be much less crime than there is today because people will realize when they commit that rape or murder, they mine as well take their drivers license out of their wallet and toss it right there on the ground because they will get that information anyway. >> if people are going to commit

violent crimes and we need to take whatever means is necessary to hold them accountable. i think it makes the job of the police officer so easy. a brilliant young arc atekt mist yeariously died from a brilliant young architect, investigators needed to know if the stories were true. university park, texas, just outside of dallas is better known as the bubble. it's a place of privilege and prestige, an address many would like to have but