We need you to come back to headquarters with us, and answer some questions.'' 'So, they pull them over and say, 'Your car is being seized through a search warrant. 'The police are now getting a little worried that maybe they're trying to flee the jurisdiction,' Cramer continues. Joe Caruso, CEO of Global Digital Forensics, says that the IP or Internet protocol address 'is very much like a phone number' and can be traced from every e-mail.

That was like leaving the gun at the scene with your fingerprints on the gun. 'That was a huge break in the investigation,' says Moura. A friend of murder victim Julissa Brisman discovers a suspicious e-mail in her friend's account that appears to be from the killer, setting up their appointment on the night of her murder.

It's a cost of doing business.'Д«ehind the scenes, detectives catch a break. Prostitutes, when they get robbed, don't call 911 and report a crime. 'He found what he thought was an easy target and that was going after prostitutes. 'Because it connected to Craigslist, everybody's imagination went wild,' says Joe Moura, a Boston-based private investigator hired by 48 Hours Mystery. The only difference this time is that the attacker is scared off by the woman's husband. 'A woman who had advertised on Craigslist. In surveillance pictures from the hotel, it again appears to be the same man as seen in Boston. Police learn of a third assault at another hotel, this time in nearby Warwick, R.I. 'It dawned on me later that he could have killed me,' she told 48 Hours. She went to the room next door and called security. Leffler says she managed to twist her way out of her restraints. Tricia says he then tied her to the bathroom door, cut the telephone lines and taped her mouth. He then picked up her cell phone and erased his number from her call list. Leffler says the man took $800 in cash, and her credit cards. He opened up my purse and immediately went after the money and put it in his pocket.' He put on black leather gloves and asked where my money was. 'He said if you be quiet, no harm will come to you. I was a little nervous and immediately started shaking. And when I turned around, that's when he pulled the gun. 'And we went into the room and as soon as I closed the door, he was standing behind me. In an exclusive interview 48 Hours Leffler says she came face-to-face with the man shown on surveillance photos taken in a downtown Boston hotel just four days before Julissa Brisman was murdered. His demeanor is very calm, like he'd done it before.' Trisha Leffler advertised her erotic services on Craigslist and is lucky to be alive. 'He didn't look like somebody who had committed murder or bound a woman and gagged her and robbed her of her money.' 'He looked like somebody who had just stepped out of the hotel bar where he'd been watching a game and downing a beer,' says Cramer. Investigators zero in on a tall, blond man who seems strangely unaffected - even calm. Surveillance stills were taken just minutes after a witness called police. Police quickly checked security cameras in and around the hotel. And during the struggle, he hit her on the head hard, and then he shot her three times.

She struggled with him as he tried to restrain her. 'Julissa, according to authorities, fought back. 'He walked into the room, he took out the gun, and he tried to get her to go to the ground or tried to get her tied up,' Cramer explains.

Law enforcement sources told Cramer that Brisman's murderer was there not for a massage, but for money. 'She would offer erotic massages that would probably, according to a friend, cross the line at a spa,' Cramer explains. And she had been supporting herself bartending and modeling, you know.'Д«risman also marketed herself as an erotic masseuse, advertising her services on Craigslist - an extremely popular online bulletin board where virtually anything and everything is for sale. She was very open about thatвЂ¦ she was really, you know, this sounds clichГ©d, but according to her friends, trying to turn her life around. Says Cramer, 'She was, I thinkвЂ¦ a young woman who was just trying to find herself, who'd hadвЂ¦ tough years in her early 20sвЂ¦ she battled alcoholism.

Craigslist killer victims photos