As crime scene officers we have the responsibility of protecting the crime scene and its integrity, here are some products you can use to help protect your crime scene.
Officers often resort to holding up a tarp or some other material to block the public’s view of a crime scene. An even better option for maintaining privacy is a privacy screen. These shields are usually around 10'-12' long and 4' high, and are convenient to use because they are small enough to fit in your cruiser or crime scene vehicle. They work well for blocking the view from the ground up for scenes like those that occur on the side of a roadway and block the wind from blowing away trace evidence.
For scenes where you want to protect access from more than one direction, you can use a privacy shield. These shields are also about 4' high, but they cover 360 degrees around the body. They also fold up to fit in your vehicle.
Whenever you are dealing with major cases, you need to fully protect the scene on all sides and from above. The best way to do this is with a free-standing tent. The tent should be one that sets up quickly, is easily transported in your cruiser or crime scene vehicle, is self-supporting at the four corners (no center pole), and includes side panels that offer protection to the officers inside doing their job.
Investing in this type of tent is worthwhile because it can also be used for other purposes. For example, it can be used for any scene when you need protection from the elements. If you know it’s going to start raining or snowing, you can set up the tent to protect key evidence. Also, if you have a case that will take a long time to process, such as a body that needs to be excavated, you can use the tent for protection while the work proceeds.
From: Protecting Your Crime Scene by Dick Warrington