Smith v. Maryland
United States Supreme Court
442 U.S. 735 (1979)
Relevant factsFree
Without a warrant, police had the phone company install a pen register recording numbers dialed from robbery suspect Smith's (defendant) home, revealing a call to the victim who had received threatening calls from someone driving a car matching Smith's; Smith was convicted after his motion to suppress the pen-register evidence was denied.
IssueFree
Whether a person has a legitimate expectation of privacy in information that the person voluntarily turns over to third parties.