This rejected the Aguilar–Spinelli test and put in place a totality-of-the-circumstances standard. This was put into place because the court recognized that there was more evidence that the Gateses were involved in drug trafficking than just the letter standing alone. The court agreed that if the letter had just stood alone it would not be probable cause to get a warrant. The court also recognized that under the Aguilar–Spinelli two-pronged test, it would be very hard for the "reliability" prong to ever be satisfied from an anonymous tip so it therefore should be abandoned.