The stalker/killer ("Mr. D.") apparently fell into the "predatory" type of stalker, as defined by Mulled et al. Predatory stalkers stalk their victims in preparation for an attack, usually a sexual attack. Such stalkers are attempting to satisfy their sexual and control needs through the stalking behavior. Stalking prospective victims enables predators to collect information on their victims in order to prepare for, rehearse in fantasy, and plan their attacks. Apparently, Mr. D.'s behavior most closely resembled an "anger retaliatory" type of stalker, as his organized stalking of the victim months before the murder and the evident overkill were representative of anger-venting, symbolic revenge. He attacked the victim as she left her real estate office at 8:14 pm at the end of her workday in a large metropolitan city in Canada. Evidence indicates that Mr.D. first attacked her in the hallway just as she was about to lock her door. At some point he handcuffed her to prevent her from escaping and led her at knife point down some stairs toward a remote ground-floor equipment room where he sexually assaulted her and stabbed her seven times. He dragged her still alive into an equipment room and slit her throat. Mr. D. was one of six people who cleaned suites on weeknights at the building where he worked, but was not a current employee. He once helped his supervisor clean the victim's fifth-floor office suite. In the year leading up to the murder, Mr. D. made five calls to the victim's office on his cell phone. Three were made just blocks from the victim's office. 27 references