Conor L. Myhrvold
Last updated Feb 12 '12 at 03:36
The idea behind being a defense lawyer is to provide the best possible defense even if you know that the person who you are defending is guilty of a crime. It is the judge or jury's job to determine guilt or innocence, in the eyes of the law.
Honestly, if you have reservations about this then I would suggest not becoming a defense lawyer, because it is one of the job requirements.
There are still lots of other positions in the courtroom available if you are interested in becoming a lawyer.