Crimes are committed for a variety of reasons. Some are the result of passion or a temper, and are usually not premeditated. Some are the result of an overwhelming desire for revenge. But for the most part, crimes are committed because the criminal is overcome with greed. That type cannot wait until he has earned what he desires, because waiting is needless. Take what you want, whenever you want it - and he'll stop at nothing to get it - not even murder...