Photographic composition is a guideline used to enhance the impact of a photograph such as angling and point of focus of the subject. It is the principle of how different subjects and visual elements are arranged in a photograph. The importance of this guideline is to enhance the focal points and eliminating irrelevant elements from the composition. In a crime scene, the photographer should strike a balance between capturing the most important elements whilst avoiding overcrowding the photo with excessive specific subjects.
Knowledge of photography is essential in portraying the different visual elements in a manner which enhances different subjects in a photo. Using a cheap disposable camera, a photographer can enhance the important elements through the use of techniques such as the ‘Rule of Third’. He will place imaginary grids – horizontal and vertical lines- on the screen and capture important elements along these grid or their meeting points. Creating a good photograph composition is least dependent on the camera but the photographer.
Crime scene investigators (CSI) should be legally learnt on the legal requirements and constraints in investigating a crime scene for evidence. The Fourth Amendment which prohibits unwarranted trespass on private property for search of evidence should be amended. The only exception to the Fourth Amendment thus far is the exigent circumstance principle. This principle allows law enforcers either to enter a premise without a warrant, or if they have a preliminary warrant. The preliminary warrant is provisional rule issued before the fourth amendment is formally invoked. For a circumstance to be referred as exigent, the lives of people must be in eminent danger, evidence is in danger of being destroyed or a suspect is likely to escape. The application of the exigent circumstance can always be challenged in a court of law. Hence amending the fourth amendment will clear the way for crime expert to gather crime information as soon as they avail themselves in a crime scene. In Michigan v. Tyler, the investigation and collection of evidence materials was prohibited by the Fourth amendment. Thus, such evidence could not be admissible in a court of law.
Crime scenes are often not clean. Pathogens and human wastes in a crime scene pose health dangers to both investigators and scene cleaners. The standard procedure ensures that he puts on Personal Preventive Equipments to avert contamination.