When a person comes in contact with other there is transfer of material from one to another. This is called:
Locard's principle
Quetlets rule
Petty's principle
None of the above
Locards principle of exchange states that when two objects come into contact with each other, there is always some transfer of maternal from one to the other. Ref: Parikh's Textbook of Medical Jurisprudence Forensic Medicine and Toxicology, 6th Edition, Pages 5.35, 7.35