One of the cornerstones of the constitutional protections of the USA. UU It is the principle of exclusion. The principle of exclusion establishes that evidence obtained as a result of an illegal entry and search or a legal interrogation is not admissible against the victim in criminal proceedings. There are several fundamentals behind the principle, including: 1) Deterrence of law enforcement officers from engaging in prohibited behaviors since valuable evidence will be lost if such conduct continues; and 2) preservation of the judicial integrity through the prevention of corruption in the court for police conduct outside the law.
I feel that is a useful tool to the president, yes, at Thanksgiving every year at the White House, President Richard Nixon pardoned himself for the water gate scandal.