米国：捜査令状によらない携帯電話のトラッキングは違法との控訴審判決

下記の記事が出ている。

　Tracking phones without a warrant ruled unconstitutional
　Naked Security: 22 September, 2017
　https://nakedsecurity.sophos.com/2017/09/22/tracking-phones-without-a-warrant-ruled-unconstitutional/

　Police use of ‘StingRay’ cellphone tracker requires search warrant, appeals court rules
　Washington Post: September 21, 2017
　https://www.washingtonpost.com/news/true-crime/wp/2017/09/21/police-use-of-stingray-cellphone-tracker-requires-search-warrant-appeals-court-rules/