In a criminal proceeding, the fruit of the poisonous tree doctrine provides that: a not only must illegally obtained evidence (i. e., the "tree") be excluded at trial, but also all evidence obtained or derived from exploitation of that evidence (i. e., the "fruit")b illegally obtained evidence (i. e. the "tree") must be excluded at trial, but evidence obtained or derived from exploitation of that evidence (i. e., the "fruit") is admissiblec evidence that a person has performed bad acts in the past (i. e., the "tree") can be introduced at trial to show a proclivity for committing the present criminal act (i. e., the "fruit")d evidence that a person has performed bad acts in the past (i. e., the "tree") cannot be introduced at trial to show a proclivity for committing the present criminal act (i. e., the "fruit")