Crime Film Cliches

In crime films police are as bad as the gangsters.
The gangsters are shown as tough guys who have turned to a life of crime because it is the only way to get ahead or they were wronged at a young age by the authorities.
In crime films there is a vaugue code that cannot be violated.
Crime movies almost always have a rat, the rat can be an undercover cop, member of the gang or even the gang leader himself.
Gangsters always have a hard time identifying the rat, even though the rat is the newest and best-looking member of the gang.
Gangster movies often include a scene in a restaurant or nightclub where somebody says the wrong thing to the wrong guy and later regrets it.
In crime movies there is usually one straight narrow whom the gangsters respect as he is not completly crooked like them.
For a crime film to work, there must be a wizened, cynical cop who is close to retirement and a young cop who is about to get married who will most certainly die and there must also be a full dress funeral service, preferably in the rain.
Finally gangster movies would not be gangster movies without the crucial scene in the hospital where a good looking young cop comes on duty to replace a cop who is guarding an important witness and turns out to be a hitman. Never once is this cop asked for ID.