Which principle restricts the use of evidence obtained through unconstitutional means?

Which principle restricts the use of evidence obtained through unconstitutional means?

• A. The fruit of the poisonous tree doctrine
• B. The good faith principle
• C. The plain view doctrine
• D. The Miranda doctrine

Answer: (A)

The idea being tested is why evidence gathered through an unlawful search or seizure is generally kept out of court, and how courts treat anything that comes from that initial illegality. The fruit of the poisonous tree doctrine is the mechanism that blocks not only the illegally obtained evidence itself but also any further evidence that police gain as a result of that illegality. This means if a warrantless or unconstitutional action starts the chain of events, the subsequent discoveries tied to that start are excluded to deter police from exploiting constitutional violations and to uphold the integrity of the system. That’s why this option is the best answer: it directly addresses the restriction on both the initial tainted evidence and its derivative fruits. The other doctrines address different situations: the good faith principle can permit evidence when officers reasonably rely on a defective warrant, which complicates the blanket exclusion; the plain view doctrine covers items seen in plain view by lawfully present officers; and the Miranda doctrine concerns warnings and interrogation rights, not the chain of causation from an unconstitutional action.

The idea being tested is why evidence gathered through an unlawful search or seizure is generally kept out of court, and how courts treat anything that comes from that initial illegality. The fruit of the poisonous tree doctrine is the mechanism that blocks not only the illegally obtained evidence itself but also any further evidence that police gain as a result of that illegality. This means if a warrantless or unconstitutional action starts the chain of events, the subsequent discoveries tied to that start are excluded to deter police from exploiting constitutional violations and to uphold the integrity of the system.

That’s why this option is the best answer: it directly addresses the restriction on both the initial tainted evidence and its derivative fruits. The other doctrines address different situations: the good faith principle can permit evidence when officers reasonably rely on a defective warrant, which complicates the blanket exclusion; the plain view doctrine covers items seen in plain view by lawfully present officers; and the Miranda doctrine concerns warnings and interrogation rights, not the chain of causation from an unconstitutional action.