Question: What Are The Four Basic Investigative Stages?

What are the 3 I’s of investigation?

The criminal is identified;The criminal is traced and located;The facts proving the guilt of the accused —– are gathered for court presentation..

What are the 4 search patterns for crime scenes?

Common search patterns include the spiral, strip/line, grid, zone/quadrant, and pie/ wheel. The spiral search is used most often for outdoor crime scenes, is conducted by one person, and is done by walking in a circle from the outermost point of the inner perimeter toward the center of the circle.

What is the golden rule in investigation?

It is equally critical to preserve Forensic Evidence in incidents in which the actions of the first responder may be subject to review in a civil arena. GOLDEN RULE OF CRIME SCENE INVESTIGATION: Do not touch, change or alter anything until it has been identified, measured and photographed. The law of mutual exchange.

What is the first step of investigation?

Step 1 – Immediate action In the event of an incident, immediate action to be taken may include making the area safe, preserving the scene and notifying relevant parties. The investigation begins even at this early stage, by collecting perishable evidence, e.g. CCTV tapes, samples.

Who secures a crime scene?

Police officers are typically the first to arrive at a crime scene. They arrest the perpetrator if he’s still there and call for an ambulance if necessary. They are responsible for securing the scene so no evidence is destroyed. The CSI unit documents the crime scene in detail and collects any physical evidence.

What are the four major steps in crime scene investigation?

Basic Stages for a Crime Scene Investigation — Possible HomicideApproach the Scene. … Secure and Protect the Scene. … Initiate Preliminary Survey. … Evaluate Physical Evidence Possibilities. … Prepare a Narrative of the Scene. … Capture the Scene Photographically. … Prepare the Crime Scene Sketch. … Conduct a Detailed Search.More items…•

What are the 5 steps of crime scene investigation?

Terms in this set (5)Interview witnesses/people involved to establish the theory of the case. … Examine the scene using a systematic search method. … Sketch the scene to create an overall diagram. … Photograph the scene, the evidence, the body to get detailed pictures of what everything looked like at that moment.More items…

What should you not do at a crime scene?

Here are 5 things you should and should NOT do when a crime scene or traumatic incident occurs in your home, business or property.1 – Do NOT touch, or have anyone else touch anything. … 2 – Do NOT clean it yourself, or have a family member or employee clean up.More items…•

What are 4 different types of crime scenes?

Different types of crime scenes include outdoors, indoor, and conveyance. Outdoor crime scenes are the most difficult to investigate. The exposure to elements such as rain, wind, or heat, as well as animal activity, contaminates the crime scene and leads to the destruction of evidence.

How do you start and end a crime investigation?

7 Steps of a Crime Scene InvestigationIdentify Scene Dimensions. Locate the focal point of the scene. … Establish Security. Tape around the perimeter. … Create a Plan & Communicate. Determine the type of crime that occurred. … Conduct Primary Survey. Identify potential evidence. … Document and Process Scene. … Conduct Secondary Survey. … Record and Preserve Evidence.

What is the first thing you do at a crime scene?

“The initial responding officer (s), upon arrival, shall assess the scene and treat the incident as a crime scene. They shall promptly, yet cautiously, approach and enter the crime scene, remaining observant of any persons, vehicles, events, potential evidence, and environmental conditions.”

What is primary crime?

The primary crime scene is where a crime actually occurred. A secondary crime scene is in some way related to the crime but is not where the actual crime took place. In a bank robbery, for example, the bank is the primary scene, but the get-away car and the thief’s hideout are secondary scenes.

What are 3 methods of investigation?

Three Types of InvestigationsDescriptive Investigations.Comparative Investigations.Experimental Investigations.

How do I know if an investigation is over?

The only surefire way to know that the investigation is over, or that it can no longer impact you in a criminal sense, is the expiration of the statute of limitations, which can vary based on the type of offense…

What are the steps in an investigation?

How to Conduct an InvestigationStep 1: Ensure Confidentiality. … Step 2: Provide Interim Protection. … Step 3: Select the investigator. … Step 4: Create a Plan for the Investigation. … Step 5: Develop Interview Questions. … Step 6: Conduct Interviews. … Step 7: Make a Decision. … Step 8: Closure of Investigation.More items…•

grid methodThe grid method is best used in large crime scenes such as fields or woods. Several searchers, or a line of them, move alongside each other from one end of the area to be searched to the other. Imagine a string of a dozen officers walking at arm’s length down a football field.

What are the different types of investigation?

Types of Criminal InvestigationFraud investigations.Crime scene investigations.Sexual crime investigations.Theft investigations.Kidnapping investigations.Assault investigations.Homicide investigations.Criminal defense investigations.

How long do crime scenes last?

Guns, Gams, and Gumshoes’s Answer: A police crime scene excludes all but those who are trained to respect procedures for preservation and collection of evidence. Generally speaking, after a period of approximately 1-24 hours, the area is returned to normal use.