( CNN ) -- The mother of a 25-year-old woman killed in a Boston hotel more than a week ago said Friday that she will remain haunted by her daughter 's death for the rest of her life . The mother of Julissa Brisman says she remains haunted by her daughter 's death . `` Our family has been devastated by the loss of our beautiful daughter , Julissa , '' Carmen Guzman said in a statement released Friday , which would have been Julissa Brisman 's 26th birthday . `` The feeling of losing my daughter in this way and the pain she must have felt will haunt me for the rest of my life , '' Guzman said . `` She wo n't live to see her dreams . We will hold Julissa in our hearts every day . '' Philip Markoff , 23 , a second-year student at Boston University 's School of Medicine , is charged with killing Brisman on April 14 at Boston 's Copley Marriott Hotel . Police have said that Brisman , a model from New York , advertised as a masseuse on the online classifieds Web site Craigslist . They say Markoff may have met her through the online site . Prosecutors say Brisman sustained blunt head trauma , and said she was shot three times at close range . One of the bullets passed through her heart , killing her , prosecutors said . Markoff , who was arraigned Tuesday , is being held without bail . His attorney , John Salsberg , told reporters after the hearing that Markoff is `` not guilty of the charges . He has his family 's support . I have not received any document or report or piece of evidence other than what I heard in the courtroom . All I have at the moment are words -- no proof of anything . '' A procedural not-guilty plea was entered on Markoff 's behalf , according to Suffolk County District Attorney Daniel Conley . Markoff is also charged in connection with the April 10 robbery of Trisha Leffler , 29 , at a Westin Hotel in Boston . Leffler was robbed of $ 800 in cash and $ 250 in American Express giftcards , according to police reports . She was held at gunpoint and bound , prosecutors said . Megan McAllister , who identified herself as Markoff 's fiancee , maintained his innocence in an e-mail sent to ABC News . McAllister said Markoff `` is the wrong man '' and `` was set up . '' `` Unfortunately , you were given wrong information as was the public , '' she wrote . `` All I have to say to you is Philip is a beautiful person inside and out and could not hurt a fly ! '' Authorities believe the motive in Brisman 's death was robbery , Conley told reporters . In executing a search warrant at Markoff 's home , police found a firearm , along with restraints and duct tape , he said . Authorities in Boston are working with police in Warwick , Rhode Island , on what could be a related case . On April 16 at a Holiday Inn Express in Warwick , a man tied up and demanded money from a 26-year-old dancer who had posted a Craigslist advertisement , Warwick Police Chief Col. Stephen McCartney said . The robbery was interrupted when the woman 's husband entered the room . After pointing his gun at the husband , the suspect fled , McCartney said . He said the incident `` may be related to similar crimes occurring in the Boston area '' but that had not been determined .
Mother of Craigslist victim Brisman says family 'devastated ' by loss . Brisman , Tuesday , charged in Brisman 's death . Police say Brisman met Markoff on popular online classifieds Web site . Markoff 's family , fiance maintains his innocence of charges .