Locard Exchange Principle
Whenever two objects come into contact with each other, traces of each are exchanged.
Tangible items that tend to prove some material fact; ex: weapons, bullets, imprints, tool marks, soil
Organic material from a living organism; ex: body parts, body fluids, hair, plant parts, feathers
Material that connects an individual or thin to a certain group
A kind of evidence that identifies a particular person or thing
Physical evidence
Biological evidence
Class evidence
Individual evidence