Following are the basic search methods, usually commissioned on the crime scene: Zonal Method. Strip Method. Line Search. Grid Method. Spiral Method (Outward Spiral & Inward Spiral) Wheel Search Method.
What are the methods of searching a crime scene?
The popular methods used to search a crime scene include: grid, line, link, ray, spiral and zone. Crime Scene Integrity. Crime scene investigators often only get one chance to properly search a crime scene before contamination (introduction of foreign materials) to the scene becomes an issue.
What are the different types of tree searching algorithms?
Under the umbrella of heuristic (informed methods) are./ Hill Climbing, Best First Search, Bidirectional Search, The Branch and Bound Algorithm, and the Bandwidth Search . Tree Searching algorithms for games have proven to be a rich source of study and empirical data about heuristic methods.
What are the different types of search techniques?
Included amongst these would normally be state space search, means ends analysis, generate and test, depth first search, and breadth first search amongst others. Breadth First Search: An uninformed search technique which proceeds level by level visiting all the nodes at each level (closest to the root node) before proceeding to the next level.
How many types of searches can an investigator conduct when investigating?
There are 4 types of searches a investigator can conduct when investigating a crime scene. But before deciding on which type of investigation is going to be used, the boundaries of a crime scene needs to be determined.
What are the types of search methods?
Searching Algorithms :Linear Search.Binary Search.Jump Search.Interpolation Search.Exponential Search.Sublist Search (Search a linked list in another list)Fibonacci Search.The Ubiquitous Binary Search.More items...•
What are the 4 types of search patterns in forensic science?
Types of Crime Scene Searches Common search patterns include the spiral, strip/line, grid, zone/quadrant, and pie/ wheel.
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.
What are the 4 systematic procedures for working at a crime scene?
The four major tasks of documentation are note taking, videography, photography, and sketching.
What are the 4 main crime scene search patterns and when are they best used?
Most commonly employed search methods are geometric patterns. The six patterns are link, line or strip, grid, zone, wheel or ray, and spiral. Each has advantages and disadvantages and some are better suited for outside or indoor crime scenes.
What are the different methods of search and types of measurement?
Methods of MeasurementsMETHODS OF MEASUREMENTS.Direct method of measurement:Indirect method of measurement:Absolute or Fundamental method:Comparative method:Transposition method:Coincidence method:Deflection method:More items...•
What are the different methods of searching a crime scene?
There are several methods used by law enforcement agencies throughout the world that follow six basic crime scene search patterns.Strip method.Wheel method.Spiral method.Zone method.Grid method.Line method. ... After the entire scene has been photographed, the gathering of evidence can begin.More items...
What are the three methods of crime scene investigation?
The three most common methods of recording a crime scene are: note taking, sketching, and photography. A detailed record of the crime scene and of the actions taken during the search of it, help the crime scene specialist to accurately recall events and to identify items of evidence later in a court of law.
What are the 5 steps in crime scene investigation?
INTERVIEW, EXAMINE, PHOTOGRAPH, SKETCH and PROCESS.
What are the 7 basic steps in crime scene investigation?
The Seven S'S of Crime-Scene InvestigationSecuring the Scene.Separating the Witnesses.Scanning the Scene.Seeing the Scene.Sketching the Scene.Searching for Evidence.Securing and Collecting Evidence.
What are the 7's of a crime scene?
These are known as the 7 S's of crime scene investigation.Secure the Scene.Separate the Witnesses.Scan the Scene.See the Scene.Sketch the Scene.Search for Evidence.Secure and Collect Evidence.
What is the golden rule in the crime scene investigation?
When it comes to crime scenes, the golden rule is “Do not touch, alter, move, or transfer any object at the crime scene unless it is properly marked, measured, sketched and/or photographed.” This rule is to be followed every day, in every scene.
What is a search pattern?
A search pattern is a system which is used in a search to facilitate the most efficient, effective, and successful search possible. Several companies design software which can be used to devise search patterns, and it is also possible to map one out by hand.
What is an example of pattern evidence?
Examples of pattern evidence include footwear prints, firearms and toolmark striations, fingerprints, blood spatter and handwriting.
What type of search pattern is used to examine a fire area?
Strip-search crime scene patterns are ideal for investigating large areas. This technique is executed by the investigators beginning at one end of the search area and continuing forward in the same direction. Spiral searches are often used to find a particular object at a crime scene.
What is grid search pattern?
The grid search: A grid search is simply two parallel searches, offset by 90 degrees, performed one after the other. The inward spiral search: The CSI starts at the perimeter of the scene and works toward the center. Spiral patterns are a good method to use when there is only one CSI at the scene.
How do investigators look for evidence?
The investigator will pretty much look for evidence by walking in the pattern you see on the picture on the left. When crimes take place in a large area, (like a football field) this is the search pattern that is used. It is conducted by the group of investigators. marked in distinctive manner.
What does it mean when an officer must prove that a search or seizure is necessary?
An officer must prove that a search or seizure is necessary, if the search is conducted there has to be a possibility that evidence in a crime or stolen items will be found.
Why is it important to package evidence correctly?
It's important to package evidence correctly to preserve everything and so it doesn't become inadmissible.
What are the steps to interviewing a victim?
There are 5 main steps: 1.) Interview - Even though the information they receive when having an interview with a victim or anyone involved may not be true , it is important to gain as much information they can to figure out what really happened. 2.)
Can police search your property?
Police may use first hand information to justify the need to search your property. Once a warrant is obtained the police may enter onto the granted area and preform a search for certain listed items. Police may search areas other than one's not specified if needed.
What is parallel search pattern?
The parallel search pattern method of crime scene search involves each member of the investigation team starting at one side of the scene and working in parallel lines to one another, across the crime scene, until they reach the other side.
What is grid method in crime scene search?
The grid method of crime scene search involves splitting the crime scene into a grid pattern. First, investigation work is done from left to right and then re-done from top to bottom. In this way, every area is explored more than once to ensure that nothing is missed.
How does the wheel method work?
Then, each moves outward from the hub of the wheel, working her way toward the circumference or perimeter of the scene. One point of caution with this method is to avoid too much commotion at the hub, since having too many investigators moving or touching things at the center can cause damage to evidence before it can be photographed, noted and cataloged.
What is strip method?
Strip Method of Crime Scenes. The line method crime scene investigation technique, also called the strip method, requires that investigators stand in a line, then begin to walk parallel to one another across the crime scene.
Where do crimes occur?
Crimes can happen in a variety of settings, ranging from populated areas to deserted stretches of highway. In addition, some crimes may occur in areas where outside factors, like water, weather or fire, play a role in impacting the evidence that remains. Depending on the investigators available, the type of crime committed and the presence of these complicating factors, the method of searching the crime scene may vary.
Do forensic investigators have to look at a crime scene?
In addition, crime scene investigators should be sure that forensic investigations occur before items are touched or moved. In most instances, investigators only have a brief time to look at a crime scene. In addition, once evidence has been moved or touched, it becomes much more difficult to solve the crime.
What is research method?
Research methods are specific procedures for collecting and analyzing data. Developing your research methods is an integral part of your research design. When planning your methods, there are two key decisions you will make.
What is mixed methods research?
In mixed methods research, you use both qualitative and quantitative data collection and analysis methods to answer your research question.
What is the difference between qualitative and quantitative research?
Quantitative research deals with numbers and statistics, while qualitative research deals with words and meanings. Quantitative methods allow you to test a hypothesis by systematically collecting and analyzing data, while qualitative methods allow you to explore ideas and experiences in depth.
What is qualitative analysis?
Qualitative analysis is used to understand words, ideas, and experiences. You can use it to interpret data that was collected: From open-ended survey and interview questions, literature reviews, case studies, and other sources that use text rather than numbers. Using non-probability sampling methods.
What is the purpose of statistical analysis?
For quantitative data, you can use statistical analysis methods to test relationships between variables. For qualitative data, you can use methods such as thematic analysis to interpret patterns and meanings in the data.
What is methodology section?
In a longer or more complex research project, such as a thesis or dissertation, you will probably include a methodology section, where you explain your approach to answering the research questions and cite relevant sources to support your choice of methods.
What is sampling in statistics?
In statistics, sampling allows you to test a hypothesis about the characteristics of a population.
