Can things like lying, cheating, stealing, or even killing ever be Justified?

I just saw the movie “Brooklyn’s Finest” and besides it being a fantastic movie, got me thinking. Is it right to perform an act of evil for the purpose of good? I mean if you had to steal bread to live, would you? If the system is broken, i.e. the justice system, would it be right to manipulate it to benefit you, knowing that if you don’t someone else will?