The major difference between the crime control model and the due process model of law enforcement is that crime control works to repress criminal activity, and due process works to protect a person's rights. Crime control is more concerned with the community as a whole, and due process places its concern on the individual.
Crime control believes that it is better to detain, question and arrest potential suspects that are later found to be innocent than to allow them to remain free. Due process proponents believe it is better to allow unproved criminals to go free than have one innocent person in jail.
It all starts with the gathering of information and evidence. A crime control model allows for law enforcement officials to do whatever necessary to find evidence. Due process limits the way the evidence can be found. In the crime control model, someone accused of a crime may be allowed to go free after arranging for some type of plea bargain. Other criminals are released due to some error during the collection of evidence, or any other due process rights. Unreasonable search and seizure is a commonly violated due process right. A mistake by the judicial system allows a criminal to go free in a due process model.