BOSTON GLOBE: Boston police arrested a Boston University medical student yesterday in the slaying of a New York woman at a luxury Back Bay hotel last week and an earlier attack on another woman. Both victims had advertised personal services on Craigslist. After an intensive manhunt along the Eastern Seaboard, Philip 
Markoff, 22, of Quincy, was stopped by police around 4 p.m. while driving south on Interstate 95 in Walpole, Boston Police Commissioner Edward Davis said at a press conference last night at police headquarters. The second-year medical student was charged with fatally shooting 26-year-old Julissa Brisman April 14 at the Marriott Copley Hotel and with the armed robbery and kidnapping of a prostitute who was tied up at the Westin Copley in the Back Bay on April 10. Brisman had advertised her masseuse service on Craigslist; the second victim was a prostitute who advertised through the online classified website. The arrest was made in two crimes whose brazen nature and swanky locale shocked Boston residents, drew national attention, and exposed the seamy world of prostitution fostered by the anonymity of the Internet. Police in Warwick, R.I., would not comment last night on whether Markoff is a suspect in a similar attack that occurred in a hotel there Thursday. MORE