How To Keep Evidence in Crime Scenes Uncontaminated

Solving a crime is tricky, and keeping evidence in crime scenes uncontaminated is trickier. So what should one do to make sure evidence of the crime remains uncontaminated?

Protecting the scene of the crime is the first and most important step in keeping evidence uncontaminated. The protection of the crime scene starts when the first police officer arrives on the scene. Upon arrival at the crime scene, the first police officer should approach in a calculated and systematical manner. Although at times this could be difficult, since the first responding officer could also be responsible for chasing down suspects, or giving first-aid to the victims, the responding officer should make mental notes as to the conditions of the scene as it was when he arrived and how it is after the situation has been stabilized. It is pertinent that police officers and sheriffs are given intensive training on how to handle and protect crime scenes.

Since establishing that the most important part of keeping evidence uncontaminated is protecting the crime scene, one could do this by using crime scene tape to secure the scene and the area surrounding where the crime took place. After the scene has been sealed and stabilized, only authorized people should be allowed to enter the area. Because human contact could compromise the integrity of the evidence, only the people responsible for the investigation of the crime, the people securing the crime scene, and those processing the crime should be there. If there were a need to bring someone in, a detective or a person who could help in the investigation, it would be wise to have that person escorted. This is to ensure that the investigators’ valuable evidence will not be tampered with and possibly destroyed or contaminated. 

When one enters a crime scene, one should wear the proper clothing to avoid contaminating the crime scene and the evidence on the scene. Usually, investigators use protective clothing or suits, face-masks and surgical gloves or latex gloves.

Collected evidence should be properly stored. Use evidence bags and evidence tubes that are appropriate for the type of evidence collected. Make sure that evidence is properly labeled. This assists in keeping evidence from being contaminated and it makes it easier for transport. After evidence has been collected, stored and properly labeled, it is important that custody of this evidence is carefully tracked and recorded. Listing the date, time, location and the person who handled such evidence is of great importance in making sure such evidence is uncontaminated.

Evidence at crime scenes is essential in resolving criminal cases. Maintaining uncontaminated evidence from the crime scene is crucial in ensuring that it can be admissible in court. To ensure a successful outcome of the investigation, properly collected, well preserved, and uncontaminated evidence plays a crucial role. As tricky as it may be for one to solve a crime, one can be sure that a crime scene properly controlled is the trick to solve it all.


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