What is the 'fruit of the poisonous tree' doctrine?

• A. Evidence derived from illegal searches or statements is generally admissible.
• B. Evidence derived from illegal searches or statements is tainted and may be excluded.
• C. It applies only to physical evidence uncovered during warrants.
• D. It requires a valid confession for evidence to be admissible.

Answer: (B)

The fruit of the poisonous tree doctrine is about how illegality in obtaining evidence taints anything that flows from it, so that derivative evidence may be excluded. When police conduct an illegal search or obtain a statement unlawfully, not only the directly gathered items but also other evidence that stems from that illegality can be kept out of court. That deterrent effect is the heart of the rule.

So the best description is that evidence derived from illegal searches or statements is tainted and may be excluded. This captures the idea that unlawfully obtained starting points contaminate subsequent discoveries, and the court can suppress those fruits to avoid rewarding improper conduct. The doctrine is grounded in the aim to uphold constitutional rights and deter unlawful policing practices.

It isn’t limited to physical items, and it doesn’t hinge on a confession being present. The rule applies to various forms of derivative evidence, and its application isn't defined by whether the initial illegality involved a warrant or a confession alone. There are complex exceptions (like independent-source or attenuation) that can allow tainted evidence to come in, but the basic principle remains: tainted evidence may be excluded to prevent the consequences of illegality from spreading.