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…showed last 75 words of 1769 total…identified and found guilty. If the case is not solved, ongoing suspicion, and lack of closure can ruin the lives of many people of many people. Thus, investigators must be familiar with crimes and their elements, modus operandi information, the major goals of investigation, and the basic functions of investigating officers. All of these factors help a detective solve cases efficiently and successfully. Studies show that criminal investigations are needed but can always use improvement.