The Sebastian Killer is a serial killer and rapist of twelve women in New York City, committing the murders in the 20th century before stopping for reasons unknown. "Sebastian", as the killer was referred to in shorthand, had a signature of stalking women to rape and then stab to death, leaving them dead and bloodied while still covered with shreds of the duct tape they were restrained with.
History[]
The case was one of the worst ones investigated by profiler Declan Gage, as well as his worst failure he could never get over. When three more women were killed with the same signature, it appeared Sebastian returned and Declan was brought back on the case, especially since one victim is the roommate of his daughter Jo.
Detective Eames ends up kidnapped, with Goren receiving a text signed with Sebastian's name. When the phone used ends up in Declan's possession, he's suspected of the murders, but Eames is found after escaping despite not knowing the killer's identity from being blindfolded when the killer harassed her. It was revealed Jo copied Sebastian's murders to get Declan's attention after ignoring her for most of her life, confessing in full to Goren when she's confronted with her motive and troubled past. The real Sebastian Killer's status was never found out. (CI: "Blind Spot")