##  [Fruit of the Poisonous Tree](/index.php/fruit-poisonous-tree) 

  ##  [Fruit of the Poisonous Tree](https://criminal.quantumdictionary.io/fruit-poisonous-tree-0) 

  

 [![Criminal Law Dictionary](/sites/default/files/styles/large/public/2026-01/Criminal%20Law.png.webp?itok=VjlKiX0o)](/index.php/topic-specific-dictionaries/law-governance/criminal-law)

- Law & Governance -

**Criminal Law Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A criminal-law concept describing conduct, procedure, or legal consequence defined by governing offense or rule elements. It applies only when the legally specified conditions for its use or enforcement are satisfied. It does not apply where required elements or conditions are absent. It materially affects charging, adjudication, detention, or sanction decisions in practice.



 

 

 

 

 





 

 



 ##  [Fruit of the Poisonous Tree](https://defense.quantumdictionary.io/fruit-poisonous-tree-1) 

  

 [![Defense, Security & Public Safety Dictionary](/sites/default/files/styles/large/public/2026-01/Defense%2C%20Security%20%26%20Public%20Safety.png.webp?itok=3-v4M7xK)](/index.php/topic-specific-dictionaries/defense-security-public-safety)



**Defense, Security & Public Safety Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A doctrine in U.S. constitutional criminal procedure extending the exclusionary rule to evidence that is derivative of prior unlawful government conduct: evidence obtained directly or indirectly as a product of an initial constitutional violation is inadmissible at trial unless the causal link to the illegality is broken or a recognized exception applies.