United States v. Aguiar: Without a warrant, the DEA (Drug Enforcement Agency) placed a GPS-tracking device on Aguiar’s vehicle. The attained data was used to advance the investigation on defendants, support applications for wiretapping warrants, and led investigators to other evidence used in trial. Defendants sought to have the evidence suppressed, claiming the use of GPS-tracking violated defendants 4th Amendment rights. In US v. Jones, the Supreme Court declared that government installing a GPS-tracking device on a car, and using that device to collect data on the owner, does indeed constitute a search. The constitutionality of such actions with probable cause but without a warrant was not decided by the Supreme Court. In the Aguiar case, the district court dismissed defendants motion to suppress the evidence.