>> anytime i can bring a case to a positive conclusion and provide a service to one of my fellow citizens that i've done my job, i feel good. a serial killer was loose and investigator had no leads until an alert investigator saw something no one else had seen, a possible fingerprint on the victim's skin. the problem was how to collect it. texas city, texas, is one of the largest oil refinery sites in america. the oil business is labor-intensive, which poses its own unique set of problems. >> we have a large population of contract workers that come in

from out of state and all over the country, come in to work at the refinery, and it greatly impacts the community, the police department from all facets, traffic and crime and things like that. >> that are became all too clear on may 16th, 2001. just after dawn in the marshland south of the city, municipal workers made a gruesome discovery. they found the bodies of two young women on the edge of a dirt road about 120 feet apart. >> the first girl that we came upon was nude, except for shoes, was bound and bloody. the second was bloody, nude. >> the victim's clothing was scattered near their bodies. the contents of their purses had been strewn about the scene. forensic investigators estimated they had been dead for less than

six hours, making the time of death some time around midnight. >> when you saw the first body, the first victim lying there, you could feel the anger that was carried out that day, at least i could. i could feel it. it was horrific. >> we were dealing with somebody who's had absolutely zero regard for another human being. he was just mean and sorry was my first thought. >> the two women were identified as 31-year-old dana feazell and 32-year-old cammy keleman. background checks revealed both worked as prostitutes. >> i do believe that my sister was a manic depressive, and she just couldn't get any help that she needed, so she took towards drugs, she self-medicated herself, and she got on the

wrong drug, and it just took her. >> dana feazell's story was similar. she had a lifelong drug problem and she had been arrested many times by local police. >> they were both beautiful young ladies, came from very good families, had a lot going for them, but it was a tragedy. >> when we got there, we realized the remoteness of that area and the sage brush and the snakes and the coyotes and the inspects, we couldn't get back in there to check to see if there was another girl that had been killed. >> so the coast guard conducted an aerial search. fortunately, there were no other victims. investigators looked at how the crimes were committed, hoping to find clues to the killer's identity. in their view, it was a disorganized crime scene, indicating it might be his first murder.

>> maybe at the time he got caught up in his actions. in my opinion, it was kind of a sloppy scene for somebody to leave so much behind. >> near the bodies, investigators found two white wash cloths. >> we thought of, was there dna on it? did he put it in their mouth? did he put some sort of other substance on it that would help him achieve his goal of controlling the girl? >> investigators also found shattered glass on the ground and embedded in one of the victims' legs. >> she apparently kicked out the glass to his vehicle and shattered the window. >> and there were beer cans in the area that looked new. >> we picked up all of those beer cans, and certainly, you do that hoping to get whatever you get off of them. >> investigators collected all of this evidence, not quite sure what, if anything, would help them find the killer. the day we rescued riley was a truly amazing day.

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two young women were murdered in the marshlands of southeast texas, and their families wanted answers.

>> i've got to say that no matter what they were doing at the time of their death, nobody deserves the way they died. not at all. >> a criminal profiler gave police a chilling warning. the person who committed these murders would strike again. >> he would, in no uncertain terms told me that this individual is going to produce numerous bodies in this area if you don't stop them and stop them immediately. >> just before they were about to take the bodies to the city morgue, an investigator thought he saw something. there was a blood smear on cammy keleman's left thigh, which looked like it contained a fingerprint. >> every minute that you wait, it just goes down, because we know they're out there in the elements. between that and the bodies are starting to sweat, you have animals, you have ants, anything

that will start anything deteriorating. >> if this was a fingerprint, lifting it would be difficult. skin is porous and stretches easily, two things that could make it impossible to get a useable print. >> the odds of getting a bloody print on a body is very slim. >> the area around the fingerprint was treated with amino black, a chemical that reacts with the proteins in blood. the stain makes a print visible. as in this simulation with a print forming on skin, the amidoblack enhanced the ridge detail of the fingerprint created in blood. >> any time you have a lot of blood, it will just actually cover up your ridges, so the less blood there is, the better print would be when you do process it with amino black. so, the very small places that had just a tiny bit of blood,

that's where i got the print. >> but there was a problem. investigators couldn't see the print clearly, so they sent it to the fbi in washington, d.c. fbi image analyst richard vorder-brugge scanned the image and examined it digitally on a computer. he immediately saw the problem. the texture of the skin on the victim's leg obscured the fingerprint. >> there were two different patterns we're dealing with here. you are dealing with the pattern of the fingerprint, which is a specific type of pattern, and then we have this texture of the skin that is distinct from the fingerprint. >> with the aid of the computer, vorder brugge first had to identify the victim's skin pattern, then have the computer remove as much of that as possible. >> it's a trial-and-error technique. it's not unlike an archaeologist

using a dental tool to scrape away fine pieces and leave the artifact intact, as opposed to taking a pick ax and just swinging for the fences. >> the computer helped identify the repeating patterns of the victim's skin. >> and i can show you how you can get rid of those wavelengths by just sending all of those bright spots to zero. >> and what was left was the print, presumably, of the killer. all investigators needed now was a suspect's print to compare it to. meanwhile, another print found at the scene, a tire impression, had significant potential. it was clearly from the side wall of a tire. >> for those conditions to exist, such as the pressure of the tire hitting the side of the mud and the moisture and the type of the soil, it was one in

a million shot that that actually came out as perfect as it did. >> it was so perfect that technicians could actually read the brand of the tire. >> we saw the entire commander logo on there, which is very, very rare. it was in perfect condition when we saw it. >> casts were made of the print and when they were examined, marks along the tread showed something unusual. >> we concluded with the assistance of the tire manufacturer that these were snow tires. well, if you ever lived in this part of texas, you know that we don't need snow tires. >> investigators worked with the manufacturer to identify where these tires were sold. >> we were able to conclude they were sold in a particular area of colorado. >> my initial thoughts that they were -- how in the world will we find this person? it was a needle in a haystack. here in philadelphia you can access a philly cheesesteak anytime, day or night. just like you can access geico anytime, day or night. there is only one way to celebrate this unique

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the murders of two prostitutes had texas police believing they were dealing with a potential serial killer. >> i think he's a monster. i think we all realized the magnitude of what we had and that this was going to happen again if we couldn't solve it. >> investigators spoke to other prostitutes in the area, hoping one of them could help them.

>> they a wealth of information about what goes on out there. if you can get a good rapport with one of the girls, you would be surprised at the amount of information. they know everything that goes on on the streets. >> that's how they uncovered an important piece of information. another local prostitute said she was attacked three days before the murders. >> she had been taken out to the same area and she had been treated in much the same way as we suppose these other girls were treated, other than the fact that she was not killed. >> she said the man tried to tie her hands behind her back with medical tape and gag her with a white rag. fortunately, she escaped. >> by the grace of god, she was able to get loose or free herself enough, and she had the will to survive that night. she had the will to survive. she was able to walk that long, lonely, dark, desolate, scary

walk to the highway. >> she described her assailant as hispanic in his early 30s with a tattoo of a dagger on his right forearm, and he was driving a white car. >> she gave us a partial license plate of c-41, and three out of six is pretty good to keep an eye out for and look for. >> incredibly, she said she kept the wash cloth he used to gag her. it was made by the same manufacturer and had the same thread count as the wash cloth found at the murder scene. >> she did everything right. she's pretty streev savvy. she's been around. she's been in some situations -- i would expect she had been in situations where she depended on her wits and nothing else to save her. >> authorities combed the area for a man and a car that fit the woman's description.

a check of motor vehicle records indicated there were many white cars with a c-41 on the license plate. >> we picked up several hispanic males driving a small, white car, and they were brought in. we took dna samples, we took pictures of tires, and we were investigating everything we could. >> three days later, detective paul edinburgh was driving into work and he passed a suspicious looking car headed out of town. >> i just happened to look to my right and there was a small, white, four-door car. this one caught my attention and i saw the first letters on the license plate it was c-41, and i'm telling you, i think my heart stopped beating. >> edinburgh pulled the car over. the driver was 30-year-old jose castillon, an orderly at a local

nursing home. >> and i saw the forearm with a tattoo of a dagger on it, and i was, two, three seconds, i was speechless, because what's going through my mind now is, this is the guy that everybody's been talking about. >> interestingly, castillon's stepfather was a texas police officer. castillon's only previous brush with the law was a misdemeanor convicti conviction, for which he served no time in jail. when questioned, castillon denied any involvement in the murders. employment and motor vehicle records showed castillon had recently moved to texas from colorado and bought a set of commander brand snow tires when he was there. these were similar to the impressions found at the crime scene. >> we saw a lot of uniformity between the tire impressions of the defendant's vehicle to the actual casts that we had taken from the crime scene. as far as tread design, tread

size, the logo itself. >> investigators noticed the back window of castillon's car was broken. pieces of that window were compared to the glass found on the leg of one of the murder victims. the refractive index, a measure of the speed of light as it passes through the glass, was identical in both samples. finally, investigators compared castillon's fingerprints to the bloody print found on one victim's leg. it matched the middle finger on his right hand. >> it was a huge moment. it was the definitive moment in we've got a very, very good case, and let's get it to trial. we've got the right man, without a doubt.

two days after the murder of dana feazell and cammy keleman, jose castillon was arrested and charged with two counts of murder, but prosecutors wanted to know, why? police assumed alcohol was involved, so they analyzed the beer cans found at the crime scene. >> through the code on the beer cans, contacted the manufacturer to find out where those beer cans would have been -- what lot would they have been sold in,

where was that lot sold. they tracked it down to the store. >> and that store's computerized sales system indicated a man bought the beer on the same night as the murders. >> they examined the receipts and found that this particular batch of beer was sold at this particular time. and sure enough, he had written a check for beer. >> the check was written for $19.68 by jose castillon. and what about the white washcloths? castillon worked at a nursing home that used hundreds of white washcloths every day. >> they took us back into their laundry area, and we dug through and found washcloths from the same manufacturer, same description, same thread count, so, we knew we had a link. >> prosecutors believed castillon probably picked up both victims at the same time.

he was drinking and carelessly discarded the beer cans. the barcode proved that castillon bought them. apparently, castillon bound the women with tape and gagged them with washcloths he stole from work. one of the girls kicked the rear windshield and broke it. a shard of glass stuck to her leg. after the murders, when he dragged the women into the grass, he left a bloody fingerprint on cammy keleman's thigh. when he drove away, he left his tire impressions in the soft mud. >> i can't even begin to imagine. and i really don't want to imagine. they probably went out and decided they were going to get high and party a little bit, and she just got in the wrong car. >> i think they were friends,

and at one point, they were picked up together, and one saw the horror of the other one dying. >> evidence technicians working fast and in difficult conditions performed a minor miracle by retrieving a print from the victim's skin. later, computer technology enhanced the print and proved jose castillon was the killer. the tire impression, too, was an almost perfect specimen. >> i think that if you tried 1,000 times to duplicate that tire impression, you could never do it. the circumstances had to be exact. >> facing a certain death sentence, castillon agreed to plead guilty to capital murder and kidnapping and was sentenced to life in prison without parole. >> it was overwhelming. how many people do you think walk in and want to plead to two consecutive life sentences if they thought they had a chance? >> the nature of the crime

indicates he was a serial killer in the making, but the decision to process the crime scene quickly and the technology that helped identify the print provided all the evidence needed to keep him from claiming even more victims. >> i think the fingerprint with the new science and with people willing to experiment to get the science where it's accepted in court was phenomenal. >> that's one of the great things about this technology is that in this case, it made a piece of evidence that was effectively useless a critical component in the prosecution of this case. >> if you've got -- you know, a fingerprint is accepted in every court in the land ads being conclusive, and if you've got the body of a female out here and has an individual's

fingerprint on her body in blood, i mean, what else can that tell you except that he was there, he has handled that body some time after there was blood on it. two young women were brutally murdered on halloween, but the killer left behind his dna, and a groundbreaking new test identified his eye color, his hair and even the color of his skin. but knowing what he looked like was one thing. finding him was another. it was close to midnight on halloween in napa, california. trick or treat had been over for hours, and 26-year-old lauren