In addition to these witness search strategies, another process known as canvassing for witnesses can also be employed. Record the identities of persons encountered and how the identity of each person was verified. For example analysis of the shoeprint pattern, size, and accidental characteristics may allow a positive match to the shoe of a suspect, or the blood may be examined to match the DNA of a victim or other originating source. What two things should photographs include? Searching for, handling, and packaging of all evidence. If it is a building, it will show the address of the location, entries, exits, windows, the position of rooms, the position of furniture, and the location of all exhibits relative to the crime. At the first level each physical exhibit has a face value represented by what it is and where it exists within the context of the crime scene. Drawn to scale and uses computer aided drafting. There is no place for an open notebook in such cases and the investigator is clearly not taking any notes at that time, but will do so after the event is under control, and as soon as it is practical to do so. Making these determinations provides the investigator with the locations where evidence of the crime may be found. Evaluate the current legal ramifications of crime scene searches (e.g., obtaining of search warrants). This process is required to expedite the investigation attached to the crime. For example: Witness Jane Doe (DOB: 8 May 64) 34345-8 St Anywhere BC Photo drivers licence ID. This pathway is known as a path of contamination and it is established by the first investigator to re-enter the crime scene after it has been locked down. The size of a crime scene is usually defined by the area where the criminal acts have taken place. Although the typical reference in court is to notes made at the time, in actuality, they are notes made as soon as practical under the unique circumstances of the event. A Crime Scene Investigator is responsible for collecting evidence found at a crime scene. In contrast, witness evidence does not have a physical quality that the court can observe. Only those people responsible for the immediate investigation of the crime, the securing of the crime scene, and the processing of the crime scene should be present. The courts do accept the operational dynamics that exists for investigators, and it sometimes becomes a question at trial to know when the notes were actually composed. This phase of crime scene investigation, which can include an investigator and a police officer, involves looking at the entire scene and forming early theories about what may have occurred during the crime. What are the three methods for recording the crime scene? That picture will be composed of witness testimony, crime scene photographs, physical exhibits, and the analysis of those exhibits, along with the analysis of the crime scene itself. If, at any point, there is a collaboration to return to an issue together and re-examine physical evidence to clarify the point for each investigator, that collaborative effort should be noted as part of the note making of each investigator. This unwanted alteration of evidence can wipe away original evidence transfer, dilute a sample, or deposit misleading new materials onto an exhibit. When this treatment is happening, non-suspect-related DNA transfer between persons and exhibits can occur. This search will include not only identifying and interviewing the persons who are immediately present, but also determining who else might have been present during the pre-crime and post-crime stages of the event. The process searching for witnesses starts at the crime scene itself. These three stages of crime can also mean there could be other locations outside the immediately crime scene area where criminal activities might have also taken place and evidence might be found. Some exhibits are perishable and impractical to seize and preserve for court. Both these first level and second level values can greatly assist in creating a reconstruction and interpretation of what happened at the crime scene. The assigned security officer is responsible for creating and maintaining the Crime Security Log, which can take various forms. Whatever witness identification strategies are used, time is of the essence. This process of isolating the crime scene inside a perimeter is known as locking down the crime scene. Each page is often initialled by the participants. In some cases, where there is extended interaction between a suspect and a victim over time and that activity has happened over a distance or in several areas, the investigator may need to identify one large crime scene, or several smaller crime scene areas to set crime scene perimeters. This occurs during large scale operations involving many participants, sometimes coordinated by an Emergency Operations Command Center. Once these skills of crime scene management and evidence management are learned and incorporated into daily practice, they will become the procedural norm and will form the essential operational habits for proper and professional investigative practice. Detailed written description of the scene with the location of items of physical evidence recovered, 1. the time an item of physical evidence was discovered. Dealing with family members of individuals involved in the crime and keeping them from contaminating the scene. For some crime scenes where there are natural barriers, such as buildings with doorways, it is easy to create a crime scene perimeter defining access. Alternately, if critical portions of the investigation are not properly recorded or are missing from the notebook, those portions of the evidence will be more closely scrutinized by the defence. The officer who is the first to arrive at a crime scene must appreciate the importance of preventing or controlling any changes in the crime scene. In more specific terms, and to the extent it is possible, begin recording all dates, times, and descriptions of persons, places, and vehicles as they emerge. The paramedic enters at his own risk but usually only after the scene is declared secure. We can only control and record ongoing contamination with a goal to avoid damaging the forensic integrity of the crime scene and the exhibits. In an ideal world, an investigator would be able to proceed through an investigation with an open notebook and record each fact and each observation of events as they transpire. For any evidence to be accepted by the court, the judge must be satisfied that the exhibit presented is the same item that was taken from the crime scene. Photograph, sketches, notes (ideally all three should be used). Crime Scene Processing During the systematic search for evidence, a leading investigator will often assign individuals to particular areas of the crime scene whilst overlooking the search for and collection of evidence. Sketch the Scene. Evidence at a crime scene is generally found in two forms. In this chapter, we have discussed the critical issues of crime scene management, evidence identification, evidence location, evidence collection, evidence protection, and proper documentation. Who is responsible for securing the crime scene? 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