ShotSpotter microphones are controversial surveillance devices designed to alert authorities to gunshots. But their exact locations have been kept secret from both the public and the police—until now. WIRED obtained leaked documents detailing the locations of over 25,500 of these devices, and what we learned abut how and where they’ve been deployed may surprise you.br br Have data or information you'd like to share with WIRED? You can reach out securely via email at dhruvmehrotra@wired.com or on Signal at dmehro.