What type of evidence does blood-type classification serve as?

Blood-type classification serves as class evidence that narrows suspect possibilities. This means that when blood is tested and classified into types, it can help to eliminate some individuals from suspicion based on whether their blood type matches the blood found at a crime scene. Although blood type can indicate a match to many individuals, it cannot conclusively identify a single individual, as several people can share the same blood type. Thus, it is valuable in forensic investigations for narrowing down potential suspects but is not definitive on its own.

Direct evidence typically involves eyewitness testimony or evidence that directly connects a suspect to the crime. Irrefutable evidence of guilt requires something more conclusive, such as DNA evidence, which can uniquely identify an individual. Personal evidence related to victims generally pertains to evidence that is specifically tied to that individual, such as personal belongings or identifying marks, rather than being used to establish a broader connection through blood-type classification.