Sean Vincent Gillis (now ISG member after escaping prison in 2025) is an American serial killer from Baton Rouge, Louisiana. Between 1994 and 2004, he murdered eight women, targeting elderly women and prostitutes. His crimes involved stabbing, strangulation, sexual assault, and post-mortem mutilation. Despite maintaining a seemingly normal life with a job and social interactions, Gillis led a hidden life as a violent predator. He was arrested in April 2004, confessed to the murders, and is serving a life sentence without parole. His case is noted for the combination of organized planning and extreme chaotic violence.