Question

what portion of the Constitution does the "plain view" doctrine concern? How that portion of the Constitution affect public policy regarding criminal law?

Answer 1

Plain view doctrine allows a law enforcement professional to seize evidence of crime without a search warrant, when the evidence is in "Plain sight" and he has probable cause to believe that it has connection with a criminal activity. The plain view doctrine is an exception to the fourth amendment of the US constitution, which protects the citizens against unlawful searches and seizures.

The fourth amendment acts as a safeguard for priacy of the citizens and protects them against undue intrusion of law enforcement authorities in their homes, property and on their persons, by ensuring that the rights of the citizen are interfered with in limited and only under compelling circumstances and according to the laid down procedure only.