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[Music] up next a vibrant successful real estate professional is brutally murdered
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this involved the entire range of violence even hardened professionals are troubled by what they see
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for there to be that much blood left at a scene that's what we consider overkill
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police find a possible witness and try hypnosis to get every detail how many times you see a
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composite sketch and you're like okay this looks like just about every human
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being on the face of the planet it was a real who done it i hate to do it the killer leaves behind a clue
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but would it be enough people will kill for the most trivial of reasons [Music] on a hot summer day a married couple
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decided to look at a sample home in the craves ranch housing development in mckinney texas
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when they walked into the sample home they couldn't find the sales associate
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but they knew right away that something was wrong and they walked into the living room and
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then they saw a blood trail leading into the kitchen and that's where they found the sales
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associate sarah walker in a pool of blood the victim was stabbed 27 times there was an incredible struggle
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furniture and plants were knocked over it looked like the victim fought for her life
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it just didn't happen in a little two by four square area if you can picture a bar room brawl
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that's probably what was happening in that show house there would be that much blood left at a scene
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that's what we consider overkill sarah walker was 40 years old recently divorced
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and the mother of two children i answered the phone it was the mckinney police department he
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said sarah has been assaulted as a result has died of her injuries and i just started screaming
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no no no sarah worked for a real estate company showing model homes to potential buyers
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and was very successful she also appeared in some sales videos dr horton is so proud to be in a neighborhood like this
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it stands out above all the rest she was thrilling and she was exciting and full of energy she would walk into a
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room and she would just light up the place she had enough energy for you know four or five people police
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found a bank surveillance video recorded a few hours before sarah's murder showing her making a deposit
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in the video she was wearing an expensive ring and watch neither one was found on
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sarah's body the watch wasn't at her home when we searched her home it wasn't in her car
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it wasn't anywhere in her office so we started to think pretty soon that whoever had killed her
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had taken that ring in that watch she had it on two hours before she died that helps us prove that in fact a
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robbery occurred police also discovered that the killer most likely posed as a client she was talking to my
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cousin she said i'm sorry i have to go somebody just walked in which means there's a customer here
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i'm gonna go sell a house just 30 minutes later sarah was dead it was hard for investigators to imagine
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a crime of this magnitude in an upscale housing development things just didn't match really it just
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struck me as the last place i would expect a crime like this to occur we had a real whodunit on our hands if
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it was a random attack we were very concerned that someone who would kill sarah in this manner was somebody who
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would probably not hesitate to do this again with a killer free no one especially
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mckinney police could sleep easily as investigators analyzed the scene of sarah walker's murder they quickly
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discovered that she was killed in the living room after a horrific struggle it was also clear that the killer was
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injured too he turned the deadbolt knob and he closed the blinds but his hand was already cut so he left
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his blood in both of those places and then at some point he dragged sarah into the kitchen
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and he tried to clean up because that was his blood in the sink investigators also found perfectly round
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drops of blood on the floor of the kitchen near the body that shape is indicative
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of blood being dripped straight down from a 90 degree angle straight down the blood evidence
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provided police with the killer's dna profile at the autopsy the medical examiner
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discovered no sign of sexual assault but he did find something extremely unusual apparently during the struggle
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the killer bit the victim on the neck it almost brought this crime down to the level of savagery
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i'm looking at the evidence of one animal biting this woman because she's some sort of pray for him
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that he's going to take and do with what he wants to and it really it really was a disgusting
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feeling in a search for suspects investigators first looked into sarah's personal life
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they discovered that sarah had recently been divorced from her second husband randy tate there was no love lost
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between the walker family and randy tate let's put it that way randy tate was the last known person to
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see sarah alive sarah dropped their son off at his house earlier that morning before she went to work bottom line is i
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want him to catch whoever did this according to her family and friends it was a divorce she did not
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want she wasn't happy with it she was hurt by it so we knew that there were some tough
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feelings randy tate claimed he had an alibi that he was playing golf with friends at
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the time of the murder he was initially very cooperative but then started to become
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hesitant in our mind to cooperate when it came to dna and that sort of thing and
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it seemed to be very angry but tate did provide his dna and it did not match the blood dna at
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the crime scene next investigators check an internet dating site that sarah joined called
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millionairematch.com when sarah got divorced that was very difficult on her self-esteem it was very hard to get back
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into the dating world sarah didn't date many men since her divorce but when your photograph is on an
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internet dating site profile there's always the risk of danger think about it this way
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if i exchange one email with a random stranger or if i just write something like no
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thanks i'm not interested you have a suspect right there if you return 30 or 40 no thank yous in a week
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and trust me women get inundated with that many requests well you've got 40 suspects
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investigators interviewed all the men sarah spoke to from the site each provided a dna sample
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and all were eliminated by this time several weeks had passed and the trail of sarah's killer was
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turning cold then unexpectedly nelson via vicenzio the husband of another realtor came
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forward with some new information he said on the morning of sarah's murder his
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wife got a call from a man who identified himself as chan lee he wanted to see the model home
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located across the street from the home where sarah was killed she felt a little suspicious about him
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and wondered if he was legitimate and she tried to call the hotel he said he was at to find out what time he was
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coming and he was not in the room that he said he was in in fact no chan lee was registered at the hotel
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but she still agreed to meet him remember when you're in the real estate business
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you're in the business of making a commission so you're going to accept all comers because you want to
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sell that house you want to make that commission the realtor did take precautions
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my wife asked me if i was going to come along and i said yes and i did it for my reasons when they
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arrived an asian male drove up in a white mustang he had a t-shirt no sleeves jeans
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sneakers very athletic and i asked him excuse me sir is your name chan lee and he
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looked up in the sky did not make any eye contact with me and sort of gave me a vague look saying
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like no but he didn't express anything the man walked quickly to his car and drove away
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while nelson and his wife waited in the town home they saw sarah walker arrive for work
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across the street i yelled at my wife come and check this out there's a beautiful striking blonde coming out of
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this sports car and she's going to the model my wife said oh that's sarah and i said oh
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sarah's looking very good she said well yeah when nelson and his wife realized that
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their appointment was a no-show they left and saw the white mustang parked next to sarah walker's car
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nelson said they considered stopping by to say hello to sarah i said well are we going to go visit
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with sarah and my wife said no we're hungry so we left they left at approximately 1pm
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sarah's body was discovered 20 minutes later if they had walked in prior to the defendant killing sarah would he
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would we have three bodies the possibility of we have visited sarah and found myself
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and ourselves in the middle of it of something terrible it will always be my mind
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i consider nelson's wife be very lucky i think there's a high likelihood that she
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would have been the victim that day had she not brought her husband along with her to
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that subdivision police now had a possible eyewitness but would it be enough real estate saleswoman sarah walker was
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robbed and murdered in the sample home of an upscale neighborhood housing development
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her friends and family reacted with disbelief the family has suffered beyond imagination
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i believe she deemed it to be safe she she was very very excited about the community when she was first placed over
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there my fondest memory of sarah she would laugh at all of my jokes whether they
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were funny or whether they were stupid she would still just laugh and so that always made you
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feel good in a fortunate turn of events a witness came forward telling police he might have seen
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sarah's killer unfortunately by the time he came forward several weeks had passed and police
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feared he might have forgotten some of the man's physical characteristics nelson just had such a brief look at
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this person i was hopeful but i was was actually kind of doubtful that that it was going to work so police
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decided to try forensic hypnosis before asking nelson any questions about the man's
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description the purpose of forensic hypnosis is to bring out the detailed memory from the subconscious nelson was
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sent to richard shang a texas ranger and a trained forensic hypnotist you get them relaxed and then in that
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relaxed state you bring up a date or an offense and place them back in a position to
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where they were where they might recall an incident forensic hypnosis has been used by law
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enforcement since the 1800s in texas they've reported a 75 success rate under hypnosis
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the images in your mind the remembrances become so much clearer that i've got a lot of faith in his
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hypnosis the memory is already there in his mind the memory i'm not placing a memory in his mind it's
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already there we're just actually going back and revisiting that day and time the hypnotist wanted
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nelson to think of the incident as if he were watching a movie and then freeze framed the image of the
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man he saw at the model home nelson described the suspect as asian muscular around 27 years old
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five foot seven inches tall with a buzz haircut after he described each feature he then
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looked through a book of photographs to choose the most similar everyone if you look closely
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they have different shaped eyes and mouths and noses and that book gives the witness an
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opportunity to flip through the pages and pick out different features that the suspect had
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slowly an image emerged of the man nelson saw that day i was saying that with these facts
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and the sketch will hit jackpot the composite drawing kind of brought the case back to the front burner again
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because for a while we had nothing the sketch was released to the media and immediately produced results yet
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another local real estate agent said she recognized the man she rented a home to him
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and she said once he came to her home asking to use her phone when she refused to let him inside he
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grew angry he's banging on her back door and now she's terrified her dog's going crazy
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this guy's now in her backyard banging on her back door so then she calls the
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police police identified the man as twenty-five-year-old kasul chantakaman his parents were from laos but he was
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born in the u.s a background check indicated he drove a white mustang worked as a delivery
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truck driver and had a history of violence from age 15 forward he was in jail he assaulted a classmate severe enough
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to be sent to juvenile detention when he was 15 he was out on that offense for several months
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and then stole a car after that he robbed and kidnapped two elderly women in north carolina
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he was released on parole just six months before sarah walker's murder he was paroled to texas because his
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sister lived here and his sister was willing to help him try to get his life back on course when
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he was interrogated by police casual denied any involvement in sarah walker's murder
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we're trying to find out the truth i think you know what's true man that you were in the
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house and you washed your hands or you went over there and got a drink of water casuel's left hand was covered
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with recently healed scars as if he'd been in a knife fight the scars weren't lined up
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all along the same plane they were kind of going every which way and police had a secret weapon the bite
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mark on sarah's body would it match kasul's teeth thanks to an eyewitness and forensic
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hypnosis investigators now had a suspect in the murder of sarah walker twenty-five-year-old kasul chanta kaman
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although he denied any involvement prosecutors were convinced that he was the killer who sewell is a
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psychopath and a sociopath and by that i mean that no matter where he is he's always thinking about himself first
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it's all about him what can he get for himself what can he do for himself and others
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others are objects to be used for his pleasure for his needs say your name for me please
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come on since the perpetrator bit the victim sarah walker investigators took photographs of
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kasul's teeth and made dental impressions the impressions were then compared to
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images of the bite mark what we tried to do is we tried to make it not match we tried to rotate the models we tried
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to flip them around we tried to make it not work and it just kept going right back to perfect match it was
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as positive as i've ever been about doing a forensic dentistry case ironically evidence found on kasul's
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cell phone indicated he had a fascination with biting he'd been fantasizing about this he had a
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photograph on his cell phone of him pretending to bite his own dog finally casuel's dna profile matched the dna of
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the blood found on the floor next to sarah's body certainly anytime you have dna i can't
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tell you how valuable that is in today's environment with jurors they appreciate it they accept it and
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since it's specific to one individual it's invaluable to us as prosecutors
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prosecutors believe casual preyed on female real estate agents because they often worked alone
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on that tragic day in mckinney texas the evidence shows that casull called his first target
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asking her to meet him at the model home but she sensed trouble and brought her husband
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which frightened him away excuse me sir are you chan lee but casual didn't give up he saw there
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was another model home across the street and he saw sarah walker arrive for work
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oh you know what somebody just walked in i won't be able to stay on the phone
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prosecutors believe he went inside and tried to rob sarah give me that watch there was a fight
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while trying to subdue her kasul bitter then he used his knife and stabbed her more than
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20 times and cut himself in the process nelson via vicenzio and his wife were just outside while the murder
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occurred had they stopped in to say hello to sarah they too might have been victims
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he would not have stopped he definitely would have kept going a beautiful successful woman her life
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tragically cut short sarah's family still tries to cope with the loss although she's not here with us now
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she is in a place that we all dream of that we all hear of and i believe that she's probably doing
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the same thing up there as she did while she was here which is helping people find their home
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in october of 2006 casull was convicted of capital murder and sentenced to death
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people will kill for the most trivial of reasons reasons that no that no rational person
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would ever imagine what the science did in this case is it made that defense attorney get up in his
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opening statement and say my client is guilty and this was a robbery combat he would not have said
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that if we hadn't had the physical evidence that we had in this case this case turned out to be the perfect
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marriage of good police work excellent science and prosecutorial expertise it was the perfect blend of all three of
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those things coming together to where we got this case from the day sarah was murdered
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until he was convicted and sentenced you