My dislike for the law

Today I had a client who had allegedly killed someone. He did this in the presence of 3 witnesses. This was probably not a god idea. Instead of just pleading guilty, he decides to plead not guilty to first-degree murder or anything. This made is so I can do nothing for his client except being there for when he is convicted and taking away. This is most likely where my great distaste in the world of crime and criminal law began.