The detective should start by ensuring the scene is

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The detective should start by ensuring the scene is totally secure and safe, and then speaking with the first responder(s) to gather as much information as possible regarding the initial state of the scene, any physical evidence and witnesses, and any actions that had been taken prior to the detective’s arrival. With this information, the detective can establish reasonable suspicion (the situation leads the detective to suspect a crime has taken place) and probable cause (there are facts and circumstances that would lead a reasonable person to believe a crime has taken place),
J10V CRIMINAL INVESTIGATION; A4_04 which are required by the Fourth Amendment for investigations to proceed, along with exigent circumstances that justify a warrantless search (Bendert, J. & Bradley, R., 2011). Referring to the jurisdiction statutes of this location, the detective must now gather information on all relevant elements. The law requires adequate proof of each element of the crime. In this particular investigation, the elements are likely to include investigating the stab wounds to the young man’s body (identifying defense wounds and/or wounds suggesting a struggle), checking for any physical evidence of forced entry to the property, conducting a walk-through investigation of the scene (Brown, M., 2001), photographing any evidence (knife, blood stains and broken furniture), checking for signs of a struggle (suggesting an altercation between the deceased and someone else), and interviewing all witnesses, particularly the blood-splattered roommate (a “consensual encounter”), with the intention of gathering statements that could lead to the roommate’s early elimination from enquiries or prosecution. Note that “The corpus delicti cannot be proved by statements made before or after the crime, but can be proved by statements made during the crime” (People vs. Carpenter, 1997). If the detective fails to determine the elements of the crime, it is unlikely that a suspect will be successfully prosecuted. Gather evidence / proof of the crime The detective should photograph outside and inside the property, drawing a diagram of the crime scene and dusting for fingerprints, processing the crime scene by identifying, collecting, and packaging and initializing physical evidence from the crime scene (such as the knife and blood
J10V CRIMINAL INVESTIGATION; A4_04 samples; for fingerprinting and DNA testing), and recording all statements made by witnesses, including neighbors.

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