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To begin with the police was distrusted but, by end of the 19th century, they were finally accepted
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Crime fiction as we know it appears for the first time in the works of Edgar Allen Poe.
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change that effected the crime story. 'the gentleman' detective was outdated.
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1920' and 30', We use the detectives inteligence to find the murder.
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We find a greater degree of realism, and the detectives behave more like human beings.