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The intelligence problem eventually requires a human analyst. However, the ever-increasing amount of data that must be investigated can overwhelm the analyst and, thus, necessitates the development of automated tools to process the information. An intelligent evidence accrual technique is proposed as a means to combine information in order to identify potential threats. The technique is able to provide both a measure of evidence and a level of uncertainty for the state. The approach is based upon a fuzzy Kalman filter that fuses several types of observations to monitor activities over a duration of time and provide an assessment of the situation. 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