...narcotics agents violated a constitutional ban on unreasonable searches when they trained a thermal imaging device on Danny Lee Kyllo's house -- without a search warrant. Kyllo's attorney, Kenneth Lerner, said the home should be a refuge...

...without a search warrant used an infrared camera known as a "thermal imager" to detect heat coming from a home where Danny Lee Kyllo was using powerful lights to grow marijuana. Police had used the imager to take infrared pictures of Kyllo's house...