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Quick Answer. Steps to conducting a criminal investigation include arriving at the crime scene, documenting the crime scene, processing the scene, and completing and recording the crime scene investigation, explains the National Institute of Justice.
By Jim fisher. Criminal investigation, as a specialized function within the field of law enforcement, has only been practiced since the first or second decade of the twentieth century, and then by only a handful of practitioners. Modern law enforcement didnât exist until the turn of the twentieth century. Up until then, civil order was maintained by the military, private security, citizen groups, members of crime victimsâ families, and vigilante organizations.