Maryland v. Garrison
Supreme Court of the United States
Argued November 5, 1986 Decided February 24, 1987
Full case name	Maryland v. Garrison
Citations	480 U.S. 79 (more) 107 S. Ct. 1013; 94 L. Ed. 2d 72; 1987 U.S. LEXIS 559
Holding
Where police reasonably believed their warrant was valid during a search, execution of the warrant does not violate respondent's Fourth Amendment rights.
Court membership
Chief Justice William Rehnquist Associate Justices William J. Brennan Jr. · Byron White Thurgood Marshall · Harry Blackmun Lewis F. Powell Jr. · John P. Stevens Sandra Day O'Connor · Antonin Scalia
Case opinions
Majority	Stevens, joined by Rehnquist, White, Powell, O'Connor, Scalia
Dissent	Blackmun, joined by Brennan, Marshall
Laws applied
U.S. Const. amend. IV

Maryland v. Garrison, 480 U.S. 79 (1987), is a United States Supreme Court case dealing with the Fourth Amendment of the United States Constitution and the extent of discretion given to police officers acting in good faith. The Court held that where police reasonably believe their warrant was valid during a search, execution of the warrant does not violate respondent's Fourth Amendment rights.

Facts

The Baltimore Police Department were executing a warrant that said the ‘3rd floor apartment’ intending to search McWebbs apartment, when the police went upstairs they searched the 3rd floor and found drugs and cash. The police, then discovered that the 3rd floor was actually divided into 2 apartments. Up to that point none of the police had realized there were 2 distinct apartments. Garrison brought a 4th Amendment claim because they did not have a warrant to search his apartment, but rather they had a warrant to search McWebbs apartment, and Garrison wanted to use the 4th Amendment to suppress the drug evidence.

Opinion

The Court finds that because the warrant allowed for investigation of the 3rd floor, the officers reasonably relied on the warrant to carry out the search. Therefore the evidence is allowed, and Garrison is not allowed to invoke the 4th Amendment protection.