US Supreme Court unanimously rules that attaching GPS tracker to car without a warrant is a violation of the Fourth Amendment

The Fourth Amendment to the US Constitution prohibits the government from engaging in "unreasonable searches and seizures."  Last week, the nine Justices of the Court issued a rare unanimous opinion agreeing that a breach of the Fourth Amendment's prohibition had occurred.  The Justices did not agree on the basis of the ruling, however.  The more conservative Justices concluded that a legal error had occurred only because attaching the GPS tracker required the police to invade personal property.  One judge indicated that while a broader right may exist, attaching the tracker to personal property was sufficient to constitute a breach.  The majority took a broader view and held that tracking a private individual for a month and collecting voluminous data without a warrant should be the foundation for the holding of a breach.