Illinois v. Gates

Illinois v. Gates
Supreme Court of the United States
Argued October 10, 1982 Reargued March 1, 1983 Decided June 8, 1983
Full case name	Illinois v. Gates et ux.
Citations	462 U.S. 213 (more) 103 S. Ct. 2317; 76 L. Ed. 2d 527
Case history
Prior	85 Ill. 2d 376, 423 N.E.2d 887; cert. granted, 454 U.S. 1140 (1982).
Holding
The rigid "two-pronged test" under Aguilar and Spinelli for determining whether an informant's tip establishes probable cause for issuance of a warrant is abandoned, and the "totality of the circumstances" approach that traditionally has informed probable cause determinations is substituted in its place.
Court membership
Chief Justice Warren E. Burger Associate Justices William J. Brennan Jr. · Byron White Thurgood Marshall · Harry Blackmun Lewis F. Powell Jr. · William Rehnquist John P. Stevens · Sandra Day O'Connor
Case opinions
Majority	Rehnquist, joined by Burger, Blackmun, Powell, O'Connor
Concurrence	White (in judgment)
Dissent	Brennan, joined by Marshall
Dissent	Stevens, joined by Brennan
Laws applied
U.S. Const. amend. IV
This case overturned a previous ruling or rulings
Aguilar v. Texas (1964) Spinelli v. United States (1969)

Illinois v. Gates, 462 U.S. 213 (1983), is a Fourth Amendment case.^[1] Gates overruled Aguilar v. Texas^[2] and Spinelli v. United States,^[3] thereby replacing the Aguilar–Spinelli test for probable cause with the "totality of the circumstances" test.