First Supreme Court of The United States case was US v Kyllo, which declared thermal imaging was an illegal entry, without a warrant. Yet private criminals can use the same technology and police are clueless and unwilling to stop the same illegal entries. Often when victims complain, the police treat them as if they are insane.
[From article]
At least 50 U.S. law enforcement agencies have secretly equipped their officers with radar devices that allow them to effectively peer through the walls of houses to see whether anyone is inside, a practice raising new concerns about the extent of government surveillance.
Those agencies, including the FBI and the U.S. Marshals Service, began deploying the radar systems more than two years ago with little notice to the courts and no public disclosure of when or how they would be used. The technology raises legal and privacy issues because the U.S. Supreme Court has said officers generally cannot use high-tech sensors to tell them about the inside of a person's house without first obtaining a search warrant.
The radars work like finely tuned motion detectors, using radio waves to zero in on movements as slight as human breathing from a distance of more than 50 feet. They can detect whether anyone is inside of a house, where they are and whether they are moving.
[. . .]
"The idea that the government can send signals through the wall of your house to figure out what's inside is problematic," said Christopher Soghoian, the American Civil Liberties Union's principal technologist. "Technologies that allow the police to look inside of a home are among the intrusive tools that police have."
Agents' use of the radars was largely unknown until December, when a federal appeals court in Denver said officers had used one before they entered a house to arrest a man wanted for violating his parole. The judges expressed alarm that agents had used the new technology without a search warrant, warning that "the government's warrantless use of such a powerful tool to search inside homes poses grave Fourth Amendment questions."
By then, however, the technology was hardly new. Federal contract records show the Marshals Service began buying the radars in 2012, and has so far spent at least $180,000 on them.
[. . .]
Other radar devices have far more advanced capabilities, including three-dimensional displays of where people are located inside a building, according to marketing materials from their manufacturers. One is capable of being mounted on a drone. And the Justice Department has funded research to develop systems that can map the interiors of buildings and locate the people within them.
[. . .]
But privacy advocates said they see more immediate questions, including how judges could be surprised by technology that has been in agents' hands for at least two years. "The problem isn't that the police have this. The issue isn't the technology; the issue is always about how you use it and what the safeguards are," said Hanni Fakhoury, a lawyer for the Electronic Frontier Foundation.
The Marshals Service has faced criticism for concealing other surveillance tools. Last year, the ACLU obtained an e-mail from a Sarasota, Fla., police sergeant asking officers from another department not to reveal that they had received information from a cellphone-monitoring tool known as a stingray. "In the past, and at the request of the U.S. Marshals, the investigative means utilized to locate the suspect have not been revealed," he wrote, suggesting that officers instead say they had received help from "a confidential source."
http://www.usatoday.com/story/news/2015/01/19/police-radar-see-through-walls/22007615/
New police radars can 'see' inside homes
Brad Heath USA TODAY 1:27 p.m. EST January 20, 2015
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