What is the principle that aims to prevent the use of illegally obtained evidence in court?

The principle that aims to prevent the use of illegally obtained evidence in court is the Exclusionary Rule. This rule promotes the integrity of the judicial process by ensuring that evidence gathered in violation of a person's constitutional rights cannot be used against them. This principle is rooted in the Fourth Amendment, which protects against unreasonable searches and seizures. By excluding such evidence, the legal system discourages law enforcement from conducting illegal searches and encourages adherence to lawful procedures.

In contrast, double jeopardy refers to the legal principle that a person cannot be tried twice for the same crime, which protects individuals from the stress and unfairness of multiple prosecutions. Probable cause is the legal standard that law enforcement must meet before conducting searches or making arrests; it establishes a reasonable ground for suspicion. A search warrant is a legal document authorized by a judge, allowing the police to conduct a search of a specified location. While these concepts are essential in the context of law enforcement and legal proceedings, they do not directly address the issue of preventing unlawfully obtained evidence from being presented in court.