The principle that states that a cross-transfer of materials ...

[genevieve1028]

The principle that states that a cross-transfer of materials occurs when two objects come into contact with each other is known as _____ _______ _______.
 
  Fill in the blank(s) with the appropriate word(s).

Question 2

Four major federal crime laboratories are those of the Drug Enforcement Administration, the Federal Bureau of Investigation, the Bureau of Alcohol, Tobacco, Firearms, and Explosives, and the _____ _________ _________ ___________.
 
  Fill in the blank(s) with the appropriate word(s).

[bigcheese9]

Answer to Question 1

Answer: Locard's exchange principle

Answer to Question 2

Answer: U.S. Postal Inspection Service

[genevieve1028]

Wow, this really help

[Liamb2179]

Thanks for the timely response, appreciate it