At a crime scene, what type of evidence is blood spatter considered?

Blood spatter is classified as biological evidence because it originates from a living organism, specifically from human blood in this context. Biological evidence encompasses materials that are biological in nature, such as blood, saliva, and other bodily fluids, which can provide critical information about a crime, such as DNA profiling and blood type analysis.

This classification is important in forensic science as biological evidence can be directly linked to a suspect or victim, helping to establish connections through genetic material. In crime scene investigations, the presence of blood spatter can also offer insights into the nature of the crime, such as the type of injury inflicted or the events that transpired during the crime.

Circumstantial evidence revolves around indirect evidence that may imply the truth of a fact, while trace evidence refers to small amounts of material that can be transferred during the commission of a crime. Physical evidence encompasses tangible items collected from a crime scene. Although blood spatter could also fall under physical evidence, its biological nature is what specifically qualifies it as biological evidence.