Collin Sullivan

**Collin Suillivan** (1971-31 July 2007) was an American police officer who worked as a captain in the Massachusetts State Police. Sullivan was extremely corrupt and was later shown to have connections to the Costello Mob and its boss, Francis Costello. He was murdered in his apartment after an intense stand off with Billy Costigan who had discovered his connections.

## Biography

#### Early Life

Collin Sullivan was born in 1971 to Irish American parents, Johhny Sullivan and his wife. During his childhood, he experienced family issues and would often live with his grandfather. When Sullivan was 14, he met Frank Costello, an Irish mob boss in his neighborhood. Costello chose to take Sullivan under his wing and began working as a mechanic and then as several other positions before he was encouraged to join the police academy by Costello.

#### Law Enforcement Career

In 2006, he graduated from the police academy and before long was assigned to run the special force that was hunting down Costello's crew. During this time as well, captain, Oliver Queenan and Sean Dignam sent officer, Billy Costigan to infiltrate the mob as an informant, ending up in prison to begin his story. Sullivan was never aware of this. Before long, Sullivan was contacted by Costello who demanded to know who the informant was in his crew. Sullivan attempted to find the informant. In one instance they saw each other which led to a chase on foot, which Costigan managed to lose Sullivan, along with this, Sullivan accidentally stabbed a Chinese restaurant worker thinking it was Costigan. Sullivan realized that only Queenan knew the identity of the informant and he had officers tail Queenan where at the same time he was on a meeting to Costigan. At the same time, Costello's men realized the informant was there thanks to Sullivan and several members arrived armed and killed Queenan while Costigan escaped with them, not revealing his cover. Sullivan traced Queenan's phone history to Costigan and also discovered that Costello was an FBI informant. In July 2007, state police ambushed Costello and his men during a drug deal and shot nearly all of them in a massive shootout in Sheffield. During the fight, Sullivan located Costello and shot him to death. Roughly a week later, he discovered Billy Costigan as the informant.

## Death

On July 24, 2007, Sullivan was instructed by Costigan to meet him at a building in the city. Sullivan arrived and was taken hostage. As they got off an elevator, Costigan was shot in the head and killed instantly by officer, James Barrigan who shortly thereafter also shot and killed Trooper Tony Brown. Sullivan grabbed Costigan's handgun and shot Barrigan in the head, killing him instantly. Sullivan then claimed that Barrigan had ambushed and shot and killed Costigan and Brown before attempting to shoot and kill him, but Sullivan was able to shoot Barrigan dead in self-defense and that Barrigan was the only Costello mole inside of the Massachusetts State Police Department and had Costigan posthumously nominated for the medal of merit. One week later on July 31, 2007, Sullivan attended Costigan's funeral and then went to the grocery store. Sullivan returned home to his apartment and Staff Sergeant Sean Dignam ambushed him. Sullivan was shot in the head and killed instantly by Dignam, who then fled the scene of the crime.