Introductory Criminal Justice: Landmark Supreme Court Cases (Mapp v. Ohio (Exclusionary Rule), Gideon v. Wainwright, Miranda v. Arizona, Terry v. Ohio, Batson v. Kentucky)

Landmark Supreme Court Cases (Mapp v. Ohio (Exclusionary Rule), Gideon v. Wainwright, Miranda v. Arizona, Terry v. Ohio, Batson v. Kentucky)

Landmark Supreme Court Cases Study Guide

What This Is This study guide covers five landmark Supreme Court cases that have significantly impacted the criminal justice system in the United States. These cases have established crucial legal standards and principles that shape law enforcement practices, courtroom procedures, and individual rights.

Key Definitions / Models / Steps

• Exclusionary Rule: The exclusionary rule prohibits the use of evidence obtained through unconstitutional means in a criminal trial. (Mapp v. Ohio, 1961)
  • Example: A police officer searches a suspect's home without a warrant and finds incriminating evidence. The evidence cannot be used in court because it was obtained unconstitutionally.
• Right to Counsel: The Sixth Amendment guarantees the right to an attorney in all felony cases. (Gideon v. Wainwright, 1963)
  • Example: A defendant is charged with a felony and requests a court-appointed attorney. The court must provide an attorney to ensure the defendant's right to counsel is protected.
• Miranda Rights: The Miranda decision established the requirement for law enforcement to inform suspects of their rights before questioning. (Miranda v. Arizona, 1966)
  • Example: A police officer arrests a suspect and reads them their Miranda rights, including the right to remain silent and the right to an attorney.
• Stop and Frisk: The Terry v. Ohio decision established the standard for a lawful stop and frisk. (Terry v. Ohio, 1968)
  • Example: A police officer stops and frisks a suspect based on reasonable suspicion of a crime, but finds no evidence of a crime.
• Batson Challenge: The Batson v. Kentucky decision established the standard for challenging a prosecutor's use of peremptory strikes. (Batson v. Kentucky, 1986)
  • Example: A prosecutor uses peremptory strikes to exclude all African American jurors from the jury. The defense can challenge the strikes as discriminatory.
• Reasonable Suspicion: Reasonable suspicion is the standard for a lawful stop and frisk. (Terry v. Ohio, 1968)
  • Example: A police officer stops a suspect based on reasonable suspicion of a crime, such as a suspicious person or activity.
• Probable Cause: Probable cause is the standard for a lawful arrest. (Mapp v. Ohio, 1961)
  • Example: A police officer arrests a suspect based on probable cause, such as eyewitness testimony or physical evidence.
• Peremptory Strike: A peremptory strike is a challenge to a juror that does not require a reason. (Batson v. Kentucky, 1986)
  • Example: A prosecutor uses a peremptory strike to exclude a juror from the jury.
• Jury Selection: Jury selection is the process of selecting a jury for a trial. (Batson v. Kentucky, 1986)
  • Example: A prosecutor and defense attorney question potential jurors to select a fair and impartial jury.
• Right to Remain Silent: The Fifth Amendment guarantees the right to remain silent. (Miranda v. Arizona, 1966)
  • Example: A suspect invokes their right to remain silent during questioning by law enforcement.

Practical Application

In a realistic scenario, a police officer stops a suspect based on reasonable suspicion of a crime. The officer must inform the suspect of their Miranda rights and obtain consent to search. If the suspect refuses to consent, the officer must obtain a warrant or have probable cause to search. If the search is unlawful, the evidence obtained cannot be used in court. In court, the prosecutor must prove the defendant's guilt beyond a reasonable doubt, and the defense attorney must ensure the defendant's rights are protected.

Common Misunderstandings

• Misunderstanding: The exclusionary rule only applies to federal cases.
• Correction: The exclusionary rule applies to both federal and state cases.
• Misunderstanding: The right to counsel only applies to felony cases.
• Correction: The right to counsel applies to all cases, including misdemeanors.
• Misunderstanding: Miranda rights only apply to custodial interrogations.
• Correction: Miranda rights apply to all questioning by law enforcement, not just custodial interrogations.
• Misunderstanding: A stop and frisk requires probable cause.
• Correction: A stop and frisk requires reasonable suspicion, not probable cause.
• Misunderstanding: A Batson challenge only applies to racial discrimination.
• Correction: A Batson challenge applies to all forms of discrimination, not just racial discrimination.

Exam Tips

• Exclusionary Rule: The exclusionary rule is a key concept in the Mapp v. Ohio case.
• Right to Counsel: The right to counsel is guaranteed by the Sixth Amendment.
• Miranda Rights: Miranda rights are required for all questioning by law enforcement.
• Stop and Frisk: A stop and frisk requires reasonable suspicion, not probable cause.
• Batson Challenge: A Batson challenge applies to all forms of discrimination, not just racial discrimination.
• Reasonable Suspicion: Reasonable suspicion is the standard for a lawful stop and frisk.

Quick Recap

• Mapp v. Ohio (1961): Exclusionary rule prohibits use of evidence obtained through unconstitutional means.
• Gideon v. Wainwright (1963): Right to counsel guaranteed by Sixth Amendment.
• Miranda v. Arizona (1966): Miranda rights required for all questioning by law enforcement.
• Terry v. Ohio (1968): Stop and frisk requires reasonable suspicion, not probable cause.
• Batson v. Kentucky (1986): Batson challenge applies to all forms of discrimination.
• Fifth Amendment: Right to remain silent guaranteed.
• Sixth Amendment: Right to counsel guaranteed.
• Fourth Amendment: Protection against unreasonable searches and seizures.
• Exclusionary rule: Prohibits use of evidence obtained through unconstitutional means.
• Reasonable suspicion: Standard for a lawful stop and frisk.
• Probable cause: Standard for a lawful arrest.