What phrase describes evidence obtained through an illegal search?

The phrase that accurately describes evidence obtained through an illegal search is "Fruit of the Poisonous Tree." This legal metaphor is used to indicate that if the source of evidence (the "tree") was obtained illegally, any evidence derived from it (the "fruit") is also tainted and, thus, inadmissible in court.

This principle is grounded in the Fourth Amendment, which protects individuals from unreasonable searches and seizures. When law enforcement conducts an illegal search, any physical evidence or testimony collected as a result is seen as having been 'poisoned' by that illegality, leading to its exclusion from legal proceedings.

The other phrases do not convey the same legal concept. "Chain of Command" refers to the hierarchy of authority within an organization, typically used in contexts related to military or organizational structure. "Exclusionary Evidence" is not a standard term; it's more accurate to refer to evidence as 'excluded' or 'exclusionary rule,' which are related concepts but do not specifically describe the evidence obtained from illegal searches. "Accessory Before the Fact" refers to an individual who assists or encourages the commission of a crime before it happens, which is unrelated to the legality of evidence collection.