Complete story — includes the ending
When a toy collector, Harry Pierce is shot dead by police in an suspected incident of domestic violence, Goren and Eames are led to a female con artist, Lori Purcell / Jocelyn Shapiro. She appears to have been exploiting lonely male collectors, but she is later found dead from carbon monoxide poisoning in a box to promote oxygen deprivation for erotic stimulation. The detectives' suspicions turn to a role-playing group obsessed with vampire fiction including her distraught boyfriend and first edition collector Dorian Cavanaugh. Goren and Eames collect the suspects together for a debriefing where they provoke Cavanaugh into confessing to Jocelyn's murder after he was led to believe she was exploiting him by the other members of the group.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Law & Order: Criminal Intent season 4. HTML formatting and reference markers removed. · Content license