In San Diego, understanding the rules around an illegal search is critical for protecting your rights. The Supreme Court case Smith v. Maryland demonstrates the limits of Fourth Amendment protections when police use devices like pen registers to record telephone numbers. Attorney Anton Vialtsin explains how these rulings affect criminal cases in San Diego and nationwide.
On March 5, 1976, Patricia McDonough was robbed in Baltimore, Maryland. She provided police with a description of the robber and the 1975 Monte Carlo he was driving. Days later, after receiving threatening phone calls, McDonough observed the same car near her home. Police identified the vehicle as registered to Michael Lee Smith and obtained a pen register to record outgoing numbers from Smith’s phone. This evidence led to a search warrant for Smith’s home, where police discovered items linking him to the robbery.
Smith was arrested and challenged the admissibility of evidence derived from the pen register, claiming it was obtained during an illegal search. Maryland courts rejected his motion, and the case ultimately reached the U.S. Supreme Court.
Justice Harry A. Blackmun, writing for the 5-3 majority, held that the Fourth Amendment does not protect numbers voluntarily shared with phone companies. Individuals cannot claim a reasonable expectation of privacy over numbers recorded in the ordinary course of business. This ruling clarified the limits of what constitutes an illegal search.
📄 Full opinion: Smith v. Maryland, 442 U.S. 735 (1979)
Understanding Illegal Search in San Diego
In San Diego, an illegal search occurs when law enforcement gathers evidence without proper authorization or violates constitutional protections. Smith v. Maryland shows how courts evaluate whether evidence collected from devices like pen registers is lawful.
How the Supreme Court Limits Illegal Search Claims
The Supreme Court clarified that using a pen register does not constitute an illegal search if individuals voluntarily provide information to third parties. San Diego attorneys rely on this precedent to assess whether evidence in a criminal case can be challenged as illegally obtained.
San Diego Criminal Defense for Illegal Searches
If you face charges based on evidence potentially obtained through an illegal search in San Diego, a skilled criminal defense attorney can evaluate the circumstances, file motions to suppress unlawfully obtained evidence, and protect your rights under the Fourth Amendment.
Frequently Asked Questions
What is a pen register?
A pen register records numbers dialed from a phone but does not capture call content.
Does the Fourth Amendment protect information shared with third parties?
Generally, no. Information voluntarily shared, like phone numbers dialed, does not have a reasonable expectation of privacy.
Can a San Diego criminal defense attorney help if evidence was obtained illegally?
Yes. An experienced attorney can challenge illegal searches and protect your rights in court.
Anton Vialtsin, Esq.
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