how does the supreme court use tests? what test does the court use when determining whether a state can use a confession obtained by police from an accused person

"The Supreme Court reversed the conviction declaring that the use of such a confession did not measure up to that degree of fairness imposed by the due process clause of the fourteenth amendment."

Explanation:

their just depressed and think that if they give pain to some one else the pain goes away from them. which it doesn't.