Videotape can be an excellent medium for documenting bloodstains at a crime scene.
If a video camera is available, it is best used after the initial walk through. This is to record the evidence before any major alterations have occurred at the scene. Videotape provides a perspective on the crime scene layout that cannot be as easily perceived in photographs and sketches. It is a more natural viewing medium to which people can readily relate, especially in demonstrating the structure of the crime scene and how the evidence relates to those structures. The value of videotaping blood evidence is that the overall relationship of various blood spatters and patterns can be demonstrated.