In the case of Morales v. New York, 1969, the U.S Supreme Court dealt with a Fourth Amendment issue concerning unreasonable searches and seizures. The petitioner, Morales, was convicted for possession of drugs in his apartment based on evidence obtained through an illegal search by police officers who had entered without a warrant or consent. The court ruled that this violated his constitutional rights under the Fourth Amendment which protects citizens from unlawful searches and seizures by law enforcement officials unless they have probable cause to believe that a crime has been committed. This ruling reaffirmed previous decisions made by the Supreme Court regarding similar issues and emphasized that all individuals are entitled to their constitutional protections regardless of their citizenship status or criminal history.

In the dissenting opinion for Morales v. New York, the justice argued that the majority's decision to uphold a search and seizure based on an officer's "reasonable suspicion" was inconsistent with Fourth Amendment protections against unreasonable searches and seizures. The justice contended that allowing such a low standard of proof could lead to arbitrary invasions of privacy by law enforcement officials. They further asserted that this ruling would disproportionately affect minority communities who are often subjected to discriminatory policing practices. The justice also disagreed with the majority’s interpretation of Terry v Ohio, arguing it did not provide sufficient justification for extending stop-and-frisk procedures beyond situations where officers have reasonable grounds to believe they are in immediate danger.