Fingerprints belonging to Boston University medical student Philip Markoff were found on a wall of the Holiday Inn Express in Warwick, R.I., where a stripper has said she was assaulted by a man she met through Craigslist. The official spoke on condition of anonymity because he was not authorized to discuss the case.
Markoff, 23, also allegedly sent text messages from the hotel, the official said. But there is no immediate information about what Markoff said or to whom he wrote.
He is also charged in a robbery of another masseuse that police say he met through the online classifieds site.
Markoff has not yet been charged in Rhode Island, but police and prosecutors there have been actively looking for links to the Boston crimes.
Meanwhile, a preliminary match has been made between bullets used to kill Brisman and a gun found in Markoff's home, police sources told the Boston Herald.
In Rhode Island, a Las Vegas woman who worked as a stripper and was offering lap dances through Craigslist told police that she was bound with cord and held at gunpoint late on April 16 at the Warwick hotel. The assailant fled when the victim's husband returned to the room.
Suffolk County prosecutors in Massachusetts have placed an ad on Craigslist in an attempt to find other women who may have been victimized by Markoff.
Markoff, who was arrested during a traffic stop Monday as he drove to Foxwoods Casino in Connecticut, was placed on suicide watch at the Boston jail where he was being held after authorities reportedly found shoelace marks on his neck.
His attorney and parents visited him Friday, and his fiancee said earlier in the week that she supported Markoff and didn't think he was capable of hurting anyone.
Meanwhile, Brisman's mother, Carmen Guzman, said in a statement Friday that losing her daughter to such a violent death will "haunt me for the rest of my life."