The Darkside of Vigilantism: When things get personal

http://www.youtube.com/watch?v=gqq9MpbQ9uU
 *WARNING: Strong Language

After failing to kill Yakavetta in their initial attempt, and losing their best friend Rocco, Connor and Murphy reunite with their father and plan to take out Yakavetta while he is on trial, again. With help from the FBI agent who has decided he agrees with the boys, and three local police officers, the trio break into the courtroom to deliver this bone chilling speech to those present.

Note the look on the face of the FBI Agent when he peers through the courtroom doors and sees the brothers and their father. He looks afraid and is obviously contemplating his decision to help them. 

*Scene from The Boondock Saints (1999). Used under fair use act for educational purposes.