This paper adopts Social Network Analysis (SNA) [1] method to find the solution to crime networks mining and central figure determining. With the help of Fisher Discriminant Analysis method and Criminal Network Core-figure Discovery (CNCD), a threshold discriminating non-conspirators from conspirators and the leader of the crime network can be obtained. The paper starts with a small network model, the result may even be used for other fields' network mining and core determination, which has important theoretical significance and application value.
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