The Boondock Saints (1999)

Fraternal twins set out to rid Boston of the evil men operating there while being tracked down by an FBI agent.

Director:

 Troy Duffy

Writer:

 Troy Duffy

Stars:

 Willem Dafoe, Sean Patrick Flanery, Norman Reedus| See full cast and crew »

Two Irish brothers accidentally killed mafia thugs. They turned themselves in and were released as heroes. They then see it as a calling by God and started knocking off mafia gang members one by one. Willem Dafoe plays the detective trying to figure out the killings, but the closer he was to catching the Irish brothers, the more he thinks the brothers are doing the right thing.