pointing it at her. she said he was nervous and his hand was actually shaking, the gun hand. and he said, "i'm broke. i don't want to kill you. i just need cards or money." >> reporter: what does she do? >> well, she was scared. she said, "i'll give you whatever you want." he immediately tied her up with these plastic handcuffs, laid her on the ground, and started looking through her room. >> reporter: same kind of zip ties that had been used in boston. >> exactly. at that point her cell phone started to ring and the gunman got very nervous when the phone kept ringing and ringing. he said, "who's calling you? why are they calling now?" >> reporter: the caller was amber's husband and her business manager. he was in the hotel lobby waiting for a signal from amber that everything was okay. when he did not get it, he began calling and headed up to his wife's room. >> suddenly, there was a man coming through the door because

her husband had the key to the room. the gunman pointed the gun at amber's husband. amber's husband took off down the hall one way. the attacker took off the other way. amber was able to jump up, and with her elbow, she elbowed the door, slammed it shut. >> reporter: the gunman escaped, although security cameras captured his image in the stairwell and lobby. how dumb is it to show your face to these people? >> what we might think is stupidity, police are more inclined to call arrogance, a person who just thinks he's smarter than everybody else, didn't expect to get caught. >> reporter: but over these seven days of rage, the craigslist killer made several crucial mistakes. showing his face to his victims, allowing his image to be captured by security cameras. but his biggest blunder was unwittingly handing investigators a road map to his

front door. >> one of julissa's friends found the e-mails between her and her 10 p.m. appointment, the man she met at 10 p.m. the night that she died, and then called boston police to tell them, "i have these e-mails. that means i have his i.p. address." >> reporter: an i.p., or internet protocol address, is unique to each computer that sends e-mail. >> that was a huge break in the investigation. >> reporter: investigator joe maura. >> that was like leaving the gun at the scene with your finger prints on the gun. it's the same exact thing. >> reporter: detectives began tracing that virtual i.p. address. and it led them to a suburb just outside boston. >> that address led police to an apartment in quincy. specifically to an apartment belonging to philip markoff. >> reporter: philip markoff-- for the first time investigators could match a name to a suspect.

and they were shocked to discover this 23-year-old was a second year medical student at boston university. >> philip markoff is a brilliant student. we know he has an uncommon mind. >> when they got philip markoff's name, they still weren't convinced. >> at that point, they put him under surveillance. >> reporter: officers from boston's elite fugitive squad began an around-the-clock stakeout. >> they began their stakeout late saturday night, early sunday morning, waiting for somebody to come out that would look like the man in these video surveillance photos. and when they did they said, "okay, we have somebody who looks like these photos." one sergeant basically called the investigators after watching him all days and said, "i like him. i like him a lot." >> reporter: but before the cops brought him in for questioning, the d.a. wanted a positive i.d.

they reached out to the craigslist killer's first target, trisha leffler. >> i got a call that morning. it was the assistant d.a. in boston, and she said, "we have a photo lineup for you. are you still in boston?" i said, "no, i'm in new york. i just left yesterday." >> reporter: it was now one week after julissa's murder. and the methodical craigslist investigation suddenly turned frantic. markoff, along with his fiancée, megan mccallister, was on the move. >> they come out carrying a small suitcase and an over-the- shoulder nap sack, get into the car and start heading down route 95 south. >> reporter: the couple was headed to foxwoods casino in connecticut. the race was on. boston authorities were intent on making sure markoff did not set foot over the state line. once that car crosses the state line... >> they're out of their jurisdiction.

so they were... they were going to have to make a quick decision. >> reporter: the boston d.a. rushed a new york detective over to trisha's manhattan hotel room with a photo array that included markoff. >> he said, "okay, now, i'm going to show you the photographs." he basically just handed me a folder, i opened the folder, and i went through them one by one. when i hit number five, i just started shaking, and i said, "this is him." >> the boston police very excitedly got on the phone with the fugitive unit and said, "get him." >> reporter: back on i-95, the police cars surrounded markoff. >> they pulled him over. they said, "we have a warrant for this automobile. we need to take it back to boston. you need to come with us." >> reporter: what was philip's reaction to this pull-over and what was megan's reaction? >> megan was talking a lot. she was very vocal.

philip was very quiet, didn't ask any questions. it was at the police station that megan really began to ask a lot more questions. "what's going on? what's happening?" philip never really spoke at all. he immediately asked for a lawyer. >> reporter: and the police immediately informed him that he was under arrest for kidnapping, armed robbery, and murder. when megan was told the news of philip's arrest, she broke down and cried. detectives saw no reason to hold her, and she was allowed to fly to her parents' home in new jersey, while markoff went off to jail. >> as soon as they told me they had him in custody, i just started crying. i was very, very happy. it was like a weight had been lifted off my chest, to know that he had finally been caught

and he can't hurt anybody else. >> reporter: but with philip markoff in custody, the questions were only just beginning. when we come back, correspondent richard schlessinger investigates the two sides of philip markoff. >> i don't really believe in split personalities. yet, there were two very just incredibly different people, and they were almost living separate lives.

>> we will do everything we can to hold him accountable for these terrible crimes. >> reporter: there were plenty of reasons for people to be shocked when philip markoff was arrested. he sure didn't look the part--

handsome young medical students seldom end up shackled and cuffed and facing the judge in a notorious case of homicide. >> this is the sort of person you would never expect to be involved in these sorts of crimes, and he counted on that. >> reporter: because he thought, what, he was sort of hiding in plain sight? here he was, the boy next door? >> exactly. >> casey jordan is an attorney and psychologist who specializes in criminal behavior. >> he presented a virtual identity to society which everyone could buy into-- the guy next door, tall and blond and handsome, a medical student engaged to a beautiful girl. >> reporter: so the last thing his friends expected was this. >> it was shocking. i went into shock. >> reporter: morgan houston was markoff's friend and study partner at the state university of new york at albany. they were both pre-med. >> he was dorky, but so many of

us are. i mean, i can be a big dork, too. >> reporter: he might have been a dork, but markoff was also a star student. how did he feel about what he was studying? >> he loved it. he was so worried about getting into the top schools. and i would say to him, "phil, you have a great g.p.a. you're going to be fine." >> reporter: in fact he finished college in just three years, graduated suma cum laude and accepted at medical school at top-ranked boston university. by 2009, markoff was a second-year med student and planning a wedding to megan mccallister, his college girlfriend. it was supposed to be a lavish, sunset ceremony at this beach resort in new jersey. instead, markoff ended up in jail and megan holed up here at her parents' house in little silver, new jersey.

the press persued her, but she stayed mostly out of sight. still, megan, who had been dating markoff for three years, came quickly to his defense after his arrest. writing reporters, "philip is a beautiful man inside and out and would not hurt a fly." >> can you tell us how your daughter is doing? >> as expected, not well. >> reporter: megan's father, jim mcallister, spoke to reporters in front of the family home two days after markoff's arrest. >> she's still confident in phil, but other than that, we're saying a lot of prayers. >> reporter: but police were making it more difficult for people to remain confident in markoff. they say they found the gun that killed julissa brisman in his apartment. it was like something out of a corny detective novel. the gun, similar to this one, was found hidden inside a

hollowed-out book. it was, of all things, a copy of "gray's anatomy," like this one, the basic reference book for all doctors and medical students. >> they found the gun in a book. that in itself doesn't mean he's guilty, but, clearly, the gun is a big thing. >> reporter: boston private investigator joe maura. >> if they show that that gun was the gun that was involved in the shooting, you've got a case-closed situation. see you later. he's gone. >> reporter: and that wasn't all the police found. remember trisha leffler's stolen underwear? >> the boston detective called me from his apartment. he said, "we did find both pairs of your underwear." >> reporter: and police report finding two more pairs of women's underwear hidden under markoff's mattress, though they haven't said whose. but if markoff was keeping underwear from his victims as trophies, it was beginning to look like these were more than just simple robberies gone wrong.

>> it wasn't just about the money. it was, "if i'm going to get the money, how can i get it and fulfill this personal need for thrill?" >> reporter: jordan thinks markoff gets his thrills from a frightening mixture of power, sex, and control. and one night, back in college, after more than a few drinks, morgan houston may have caught a glimpse of philip markoff's thrill-seeking. >> going up into the tower where i lived, he cornered me and pushed me up against the wall and was trying to kiss me, and i was saying, "no, phil." you know, "we're just friends. what are you trying to do?" i was trying to push him away, and he was being forceful and i couldn't... i couldn't physically get him off me. thankfully one of my very close friends had come along, and he was able to pull him off of me and i was able to escape upstairs. >> reporter: were you scared?

>> yeah, of course. i had no control. he wasn't listening to me when i was saying no. >> reporter: did he apologize? no, i'm not sure... he never mentioned it. so i'm not sure he even remembered. and i just... it was awkward. i just wanted to forget about it. it wasn't the phil i knew, so i chalked it up to the alcohol. >> reporter: maybe it was the alcohol or maybe it was a hint of what the real philip markoff was like. the day after markoff's arrest, a report surfaced that he had traded e-mails with a transvestite advertising on craigslist. >> it appeared that he was interested in homosexual sadomasochism, and he was interested in being the submissive partner. >> reporter: steve huff is a crime blogger and a contributor to the "true crime report." following up on the e-mail address markoff reportly used, "sex addict 5385," huff made a startling discovery.

>> i received a tip that if you added another "8" to that address, there were secondary profiles that nobody knew about yet. >> reporter: and here is one of the profiles huff found for sex addict 53885, believed to be markoff, on alt.com, a personals web site for the very adventurous. it lists these among his interests-- chains, collars, leashes and experimentation with transvestites, among others. >> everybody answers questions on these profiles. one of them was, "how often do you think of these things? and he answered, "all the time." >> reporter: and it's not an isolated entry. it looks like markoff was all over the internet. >> reporter: philip markoff had profiles on gayclublist.com, extremerestraints.com, and alt.com. >> reporter: how certain are you that the fellow you're reading about on that web site is philip markoff?

>> oh, i'm certain. >> reporter: how can you be sure? >> all the evidence points to him. the person posting had the same birth date as markoff. he had the... of course, he had the similar handles, the sex addict handle. also, the date that the profile had been published was about two years ago. it's hard to fake that. >> reporter: there's also this-- boston police have confirmed the torso shot seen here was found on markoff's laptop. these secret profiles, and his alleged solicitation of a transvestite, suggest to psychologist casey jordan that markoff's public persona was at war with his deeper desires. >> he really did have this other double life. now, that in and of itself doesn't cause people to rob or to kill, but what it does is very often cause what we call in

criminology a fractured identity. that conflict can actually result in violence. >> reporter: police say in february, markoff used a fake i.d. to buy a gun in new hampshire, the same gun police report finding in his apartment. he bought the gun several months before he started doing this. what does that tell you about him? >> very often, there's a trajectory to these crimes. i mean, it's mostly myths that people just wake up one day and decide to become criminal and snap. so buy the gun, handle the gun, put the gun inside the book. time passes, nobody looks inside the "gray's anatomy." "look what i can do." that's part of the thrill. everyone thinks i'm a brilliant medical student, but i have everybody snowed. >> reporter: and that may have been why this young medical student was ready to strike again just two days after killing julissa brisman. >> he wasn't afraid of killing at this point. he had the gun.

he was willing to use it, and he was willing to go back into a similar situation within days of his last violent encounter. at some level, the thrill of tying these women up, robbing them, even killing one, was evolving within him and turning him into somebody that he liked. (announcer) nancy decided she can't afford so many bathroom detours when sixty percent off is at stake, so today, she's talking to her doctor about overactive bladder. teri decided she's tired of always stopping to "go", so today, she's talking to her doctor, too. if you have overactive bladder symptoms, today is the day to talk to your doctor and ask about prescription toviaz. one toviaz pill a day significantly reduces sudden urges and accidents over 24 hours, all day and all night. plus, toviaz comes with a simple plan with tips on food and drink choices and training your bladder. if you have certain stomach problems or glaucoma,

or cannot empty your bladder, you should not take toviaz. toviaz can cause blurred vision and drowsiness so use caution when driving or doing unsafe tasks. the most common side effects are dry mouth and constipation. today, laura decided it was time she learned how to show that bladder who's boss. talk to your doctor and ask if toviaz is right for you. >> reporter: with philip markoff behind bars... >> there is a possibility that philip markoff has done this before. >> reporter: district attorney dan conley made a public plea to other possible victims. >> if you have been a victim, like these victims have been, please come forward. >> reporter: and for the first

time since markoff's arrest... >> a short time ago philip markoff's parents left... >> reporter: his father, dr. richard markoff, and his mother, susan haynes, visited him in jail. >> do you still believe in your son's innocence? >> reporter: markoff's older brother also visited him. >> his brother john and his wife diana... >> reporter: and soon after, reports began to circulate that a distraught markoff told his brother to forget about him and move to california because even more damning information would be revealed. it was yet another shock for markoff's family, who lived in upstate new york. >> his mother worked at a casino. his father was a dentist. and by all accounts, he had a normal, happy upbringing. >> reporter: but writer maureen orth thinks his parents' divorce may have caused markoff to feel isolated. >> at a very, very young age his father went and took his brother to live with him, and then he

lived with his mother, and then his mother remarried and had a baby with her second husband. i got the sense philip was the odd kid out. >> reporter: markoff's parents and brother were unwilling to speak to the press, so markoff's lawyer, john salsberg, spoke for them. >> you know, they love their son very much. they're supportive of him. and that's what they... that's what they would say if they were speaking themselves. >> reporter: salsberg is considered one of the finest defense attorneys in boston, but markoff is getting his services for free. >> philip markoff, when he was arrested as the craigslist killer, told the court almost immediately that he was indigent, that he had no money. >> reporter: the former med school student, who was quickly expelled by boston university after his arrest, told the court he owes $130,000 in school loans. and he clearly loved to gamble. >> he had made 19 trips to foxwoods casino from the beginning of the year, and he

was gambling and going there. he had, obviously, gone to foxwoods the night that he is alleged to have attacked the third victim. >> reporter: orth did not find evidence of gambling debt, but she believes markoff's gambling fits in well with his overall reckless personality. >> he was also going to foxwoods while he was in the middle of finals. >> picture the most thrilling moment you've ever had in your life, whether it's a roller coaster ride, winning the baseball game, he's addicted to that. we see it often with people who are gamblers and they feel more alive than ever in that moment of exhilaration or thrill. some people can get that satisfied by riding the roller coaster. other people need to put a gun in your face and make you obey them to get that feeling of exhilaration. >> reporter: markoff is accused of doing just that to three women during his april crime spree.

and so far, they are his only known victims. last summer, a boston grand jury indicted markoff on first degree murder for killing julissa brisman and the kidnapping and armed robbery of trisha leffler. markoff was required to appear in court to answer those charges, and for the first time since the case catapulted into the headlines, the public would get a chance to hear the man at the center of this media hurricane. >> how do you plead to this indictment, sir? >> not guilty. >> reporter: not guilty. markoff sounded confident in his innocence, but he and his lawyer are in a distinct minority. >> the police have incredibly strong evidence against philip markoff. >> reporter: among the items allegedly found in markoff's

apartment, not only trisha's underwear, but her credit cards as well. and disposable cell phones, allegedly used to arrange meetings with his victims. it's almost like he wanted to get caught. >> you could make that argument. the killer left a lot of clues. >> reporter: the authorities have plenty to build a case-- the damning security camera stills, trisha's eyewitness identification, markoff's fingerprints allegedly found on the duct tape used on trisha and... >> most devastating the .9 millimeter gun in the hollowed out copy of "gray's anatomy". >> reporter: has a ballistics n6x)

markoff was training to save lives is the place where julissa brisman died of gunshot wounds.

captioning sponsored by cbs captioned by media access group at wgbh access.wgbh.org >> i loved the man, but i loathed the life. >> her father is responsible for the deaths of certain people. >> i don't deny that he was involved in that life. when you choose that life, i think you know what you're signing on for. he told me that he worked with a construction crew. >> the gottis, we know what they're all about. >> i remember looking at her and saying, "where is my father?" >> you know they're going to try and keep you in jail. >> she looked at me and she said, "he's in jail."

those words, they just haunted me. >> reporter: your father was convicted for killing paul castilano. >> yes. do i believe now that my father was this big boss? yes, i do now. people treat him like he was the second coming of christ. that was my wedding. >> reporter: 1,500 guests? >> they were there to pay homage to him. >> john junior gotti is again on trial. >> everybody mistakes us for something that we're not. >> if convicted, he could face life behind bars. >> i'm fearful. i'm terrified. was it all worth it? the loyalty to that life? what did it get you? where did it get you? what was this all for?