Connor O'Brien

Connor O'Brien is a spree killer (originally mission-based serial killer) who appeared in the season five episode "Public Enemy"

Background
As a child, O'Brien's father killed his mother for the insurance money. He testified against his father and got him put in prison. Sometime in his life, O'Brien got a job as a frycook at a diner in Providence, Rhode Island.

Public Enemy
O'Brien killed two people prior to Public Enemy. One at a local laundromat, and the other at a local restaurant. He later killed Captain Collins at a church in the city. He killed his victims to feed off of their grief, like an arsonist would do after his fires. When he killed a flower salesman, he decided to become part of the crime scene. When Officer John Liddy attempted to detain him, he stabbed him and fled. When the news focused on the victim instead of the killer, O'Brien tried to get the grief from the local police. When an officer insulted the killer, O'Brien left to go find a new victim. He killed a woman at the local library. When that wasn't enough, he entered a local store and was falsely informed that his victim survived. He fled to the scene to verify, but was found by the police. After going to prison, he got in line behind his father and stabbed him to death.

Modus Operandi
Connor sought his victims out during the day, in crowded public places that held some significance in a person's daily life. Approaching a random pedestrian, Connor would put on a pair of gloves (so as not to leave fingerprints) and sneak up behind them, slitting their throat with a knife and fleeing the scene when panic set in, leaving his weapon behind. As his need for attention grew, Connor began lingering at the crime scenes, even pretending to be a panicking bystander after murdering the marketplace florist.

Known Victims

 * Mike O'Donnell
 * Karen Lagrassa
 * Captain Paul Collins
 * Unnamed woman
 * Unnamed florist
 * Officer John Liddy
 * Julia Vecchia
 * William O'Brien

Appearances

 * Season Five
 * "Public Enemy"