Lumber co v us this expansion of the exclusionary

Lumber Co. v. U.S. This expansion of the exclusionary rule to ban the use of
evidence indirectly based on an illegal government action is called the fruit-
of-the-poisonous-tree doctrine. The idea behind the doctrine is that the
government should never be in a better position after violating the
Constitution than it was before it broke the law. Weeks and Silverthorne
restricted the exclusionary rule to private papers. But in Agnello v. U.S.
(1925), the Court created a full-blown rule of exclusion at federal trials. The
Supreme Court agreed, expanding the rule beyond papers to include the
contraband cocaine. However, the exclusionary rule only applied to federal
cases. In Mapp v. Ohio (1961), the Supreme Court extended the exclusionary
rule to the states when it ruled that evidence seized illegally from Dollree
Mapp’s home couldn’t be used against her in a state prosecution.
4. Identify and explain the rationales behind the three justifications for the
exclusionary rule. Which justification does the U.S. Supreme Court use today?

excluding valid evidence.