Transfer of evidence

• Produced when physical contact between objects results in exchange of matter. This concept is based on Locard exchange principle, which states that “every contact leaves a trace”.
• They are typically thought of as small in size ( hair or fibers) but they may be large enough to be clearly seem with naked eye.
• Example: if a suspect suffered a dog bite wound and then grabbed the dog’s collar before killing it, any blood deposited on collar would be considered transfer evidence.
• Evidence can also be labelled in terns of how reliable it is in proof of fact in court of law, terms “ circumstantial evidence and direct evidence” are commonly used. But this categorization will most likely be unknown at the time of collection.