Board of Education v. Earls and Illinois v. Gates, have a relationship to which mutual country?
Board of Education v. Earls: Board of Education v. Earls, 536 U.S. 822 (2002) , was a United States Supreme Court case in which the Court upheld the constitutionality of mandatory drug testing by public schools of students participating in extracurricular activities. Illinois v. Gates:  "Gates" overruled "Aguilar v. Texas", 378 U.S. 108 (1964) and "Spinelli v. United States", 393 U.S. 410 (1969) , thereby replacing the Aguilar–Spinelli test for probable cause with the "totality of the circumstances" test.
United States