BOSTON, Massachusetts (CNN) -- A 22-year-old medical student suspected of killing a woman he may have met through a Craigslist online ad was arraigned Tuesday and will be held without bail.

A Boston University spokeswoman said the school suspended Markoff, who has no criminal record, when it learned of the charges on Monday.

Markoff is charged with killing 26-year-old Julissa Brisman of New York on April 14 at Boston's Copley Marriott Hotel. Evidence from the scene suggests that Brisman "put up a fight," prosecutor Jennifer Hickman said during the hearing Tuesday. Police said Brisman, a model, advertised as a masseuse on Craigslist, a popular online classifieds service.

Markoff is also charged in connection with the robbery four days earlier of a woman at a Westin Hotel. In that case, the woman made arrangements to meet a man through Craigslist for a massage at the hotel, but was held at gunpoint and bound, Hickman said. She was robbed of $800 and personal items, and left tied to a door handle with duct tape over her mouth, Hickman said in court Tuesday. Police said earlier the Westin victim was 29. She was not identified.

Police traced the Internet communications with Brisman to an e-mail account opened the day before her death, Conley said. Using Internet provider information, they found the computer was at Markoff's residence in Quincy, Massachusetts, he said. Authorities put the home under surveillance, Conley said, and "the case just begins to build from there."

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Craigslist is straight creepy. This so sad, these girls are out of there minds...... I know that prostitution is the oldest profession and jobs are hard to come by, but people are too crazy these days..... watch out ladies, it's the normal looking ones that are the psychos!!



- young