As much information as possible should be gathered about the murder scene before the investigators start their examination.
Once more, it is advised to move slowly and methodically. In order to prevent the destruction of priceless and/or delicate evidence, such as shoeprints, trace evidence, etc., information is acquired.
Processing a crime scene begins with an interview. The victim or the first officer on the site must be questioned by the crime scene technician in order to determine the "theory" of the case. basically what is said to have occurred, what crime was committed, and how it was committed.
All witnesses must be located and extensively questioned by police officers or detectives. If the police don't take the time to find and speak with witnesses as early in the investigation as possible, they risk permanently losing those witnesses and the information they contain to both the prosecutor and the criminal defense lawyer.
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